15545135320 has 256 divisors, whose sum is σ = 42796615680. Its totient is φ = 5005977600.

The previous prime is 15545135303. The next prime is 15545135329. The reversal of 15545135320 is 2353154551.

It is a super-2 number, since 2×15545135320² (a number of 21 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (15545135329) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 14247975 + ... + 14249065.

It is an arithmetic number, because the mean of its divisors is an integer number (167174280).

Almost surely, 2^15545135320 is an apocalyptic number.

15545135320 is a gapful number since it is divisible by the number (10) 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 15545135320, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (21398307840).

15545135320 is an abundant number, since it is smaller than the sum of its proper divisors (27251480360).

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

15545135320 is a wasteful number, since it uses less digits than its factorization.

15545135320 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1226 (or 1222 counting only the distinct ones).

The product of its (nonzero) digits is 45000, while the sum is 34.

Adding to 15545135320 its reverse (2353154551), we get a palindrome (17898289871).

The spelling of 15545135320 in words is "fifteen billion, five hundred forty-five million, one hundred thirty-five thousand, three hundred twenty".