155840522964 has 384 divisors, whose sum is σ = 451411968000. Its totient is φ = 41767850880.

The previous prime is 155840522951. The next prime is 155840522969. The reversal of 155840522964 is 469225048551.

It is a super-2 number, since 2×155840522964² (a number of 23 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (155840522969) by changing a digit.

It is a polite number, since it can be written in 127 ways as a sum of consecutive naturals, for example, 956076747 + ... + 956076909.

It is an arithmetic number, because the mean of its divisors is an integer number (1175552000).

Almost surely, 2^155840522964 is an apocalyptic number.

155840522964 is a gapful number since it is divisible by the number (14) 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 155840522964, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (225705984000).

155840522964 is an abundant number, since it is smaller than the sum of its proper divisors (295571445036).

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

155840522964 is a wasteful number, since it uses less digits than its factorization.

155840522964 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 408 (or 392 counting only the distinct ones).

The product of its (nonzero) digits is 3456000, while the sum is 51.

The spelling of 155840522964 in words is "one hundred fifty-five billion, eight hundred forty million, five hundred twenty-two thousand, nine hundred sixty-four".