155527989760 has 640 divisors, whose sum is σ = 472051286784. Its totient is φ = 48271196160.

The previous prime is 155527989751. The next prime is 155527989763. The reversal of 155527989760 is 67989725551.

It is a happy number.

It is a tau number, because it is divible by the number of its divisors (640).

It is a Harshad number since it is a multiple of its sum of digits (64).

It is a junction number, because it is equal to n+sod(n) for n = 155527989692 and 155527989701.

It is not an unprimeable number, because it can be changed into a prime (155527989763) 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, 416964934 + ... + 416965306.

Almost surely, 2^155527989760 is an apocalyptic number.

155527989760 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 155527989760, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (236025643392).

155527989760 is an abundant number, since it is smaller than the sum of its proper divisors (316523297024).

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

155527989760 is a wasteful number, since it uses less digits than its factorization.

155527989760 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 504 (or 488 counting only the distinct ones).

The product of its (nonzero) digits is 47628000, while the sum is 64.

The spelling of 155527989760 in words is "one hundred fifty-five billion, five hundred twenty-seven million, nine hundred eighty-nine thousand, seven hundred sixty".