155602643328 has 384 divisors, whose sum is σ = 510691184640. Its totient is φ = 46767974400.

The previous prime is 155602643311. The next prime is 155602643341. The reversal of 155602643328 is 823346206551.

155602643328 is a `hidden beast` number, since 1 + 5 + 5 + 60 + 264 + 3 + 328 = 666.

It is a tau number, because it is divible by the number of its divisors (384).

It is a super-2 number, since 2×155602643328² (a number of 23 digits) contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 43450498 + ... + 43454078.

It is an arithmetic number, because the mean of its divisors is an integer number (1329924960).

Almost surely, 2^155602643328 is an apocalyptic number.

155602643328 is a gapful number since it is divisible by the number (18) 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 155602643328, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (255345592320).

155602643328 is an abundant number, since it is smaller than the sum of its proper divisors (355088541312).

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

155602643328 is a wasteful number, since it uses less digits than its factorization.

155602643328 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3748 (or 3724 counting only the distinct ones).

The product of its (nonzero) digits is 1036800, while the sum is 45.

Adding to 155602643328 its reverse (823346206551), we get a palindrome (978948849879).

The spelling of 155602643328 in words is "one hundred fifty-five billion, six hundred two million, six hundred forty-three thousand, three hundred twenty-eight".