155397295872 has 432 divisors, whose sum is σ = 553985385408. Its totient is φ = 40795176960.

The previous prime is 155397295871. The next prime is 155397295873. The reversal of 155397295872 is 278592793551.

155397295872 is a `hidden beast` number, since 1 + 5 + 539 + 7 + 2 + 95 + 8 + 7 + 2 = 666.

It is an interprime number because it is at equal distance from previous prime (155397295871) and next prime (155397295873).

It is a Harshad number since it is a multiple of its sum of digits (63).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (155397295871) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 48850122 + ... + 48853302.

Almost surely, 2^155397295872 is an apocalyptic number.

155397295872 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 155397295872, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (276992692704).

155397295872 is an abundant number, since it is smaller than the sum of its proper divisors (398588089536).

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

155397295872 is a wasteful number, since it uses less digits than its factorization.

155397295872 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3456 (or 3439 counting only the distinct ones).

The product of its digits is 47628000, while the sum is 63.

The spelling of 155397295872 in words is "one hundred fifty-five billion, three hundred ninety-seven million, two hundred ninety-five thousand, eight hundred seventy-two".