157557505572 has 72 divisors (see below), whose sum is σ = 406829961720. Its totient is φ = 51395535360.

The previous prime is 157557505559. The next prime is 157557505577. The reversal of 157557505572 is 275505755751.

It is a happy number.

157557505572 is a `hidden beast` number, since 15 + 7 + 5 + 5 + 7 + 50 + 5 + 572 = 666.

It can be written as a sum of positive squares in 4 ways, for example, as 61348354596 + 96209150976 = 247686^2 + 310176^2 .

It is a super-2 number, since 2×157557505572² (a number of 23 digits) contains 22 as substring.

It is a Smith number, since the sum of its digits (54) coincides with the sum of the digits of its prime factors.

It is not an unprimeable number, because it can be changed into a prime (157557505577) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 636072 + ... + 848352.

It is an arithmetic number, because the mean of its divisors is an integer number (5650416135).

Almost surely, 2^157557505572 is an apocalyptic number.

157557505572 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 157557505572, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (203414980860).

157557505572 is an abundant number, since it is smaller than the sum of its proper divisors (249272456148).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

157557505572 is a wasteful number, since it uses less digits than its factorization.

157557505572 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 212733 (or 212728 counting only the distinct ones).

The product of its (nonzero) digits is 10718750, while the sum is 54.

The spelling of 157557505572 in words is "one hundred fifty-seven billion, five hundred fifty-seven million, five hundred five thousand, five hundred seventy-two".