155297178456 has 64 divisors (see below), whose sum is σ = 445023022080. Its totient is φ = 44238942720.

The previous prime is 155297178409. The next prime is 155297178461. The reversal of 155297178456 is 654871792551.

It is a happy number.

It is a self number, because there is not a number n which added to its sum of digits gives 155297178456.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1314880 + ... + 1428111.

It is an arithmetic number, because the mean of its divisors is an integer number (6953484720).

Almost surely, 2^155297178456 is an apocalyptic number.

It is an amenable number.

155297178456 is an abundant number, since it is smaller than the sum of its proper divisors (289725843624).

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

155297178456 is a wasteful number, since it uses less digits than its factorization.

155297178456 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2743344 (or 2743340 counting only the distinct ones).

The product of its digits is 21168000, while the sum is 60.

The spelling of 155297178456 in words is "one hundred fifty-five billion, two hundred ninety-seven million, one hundred seventy-eight thousand, four hundred fifty-six".