155891256795 has 48 divisors (see below), whose sum is σ = 279602500320. Its totient is φ = 80295925248.

The previous prime is 155891256761. The next prime is 155891256799. The reversal of 155891256795 is 597652198551.

155891256795 is a `hidden beast` number, since 1 + 5 + 58 + 9 + 12 + 567 + 9 + 5 = 666.

It is not a de Polignac number, because 155891256795 - 2⁷ = 155891256667 is a prime.

It is not an unprimeable number, because it can be changed into a prime (155891256799) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 280392 + ... + 624821.

It is an arithmetic number, because the mean of its divisors is an integer number (5825052090).

Almost surely, 2^155891256795 is an apocalyptic number.

155891256795 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

155891256795 is a deficient number, since it is larger than the sum of its proper divisors (123711243525).

155891256795 is a wasteful number, since it uses less digits than its factorization.

155891256795 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 905356 (or 905353 counting only the distinct ones).

The product of its digits is 34020000, while the sum is 63.

It can be divided in two parts, 155891 and 256795, that added together give a triangular number (412686 = T₉₀₈).

The spelling of 155891256795 in words is "one hundred fifty-five billion, eight hundred ninety-one million, two hundred fifty-six thousand, seven hundred ninety-five".