155891256808 has 32 divisors (see below), whose sum is σ = 335438832960. Its totient is φ = 66533310720.

The previous prime is 155891256799. The next prime is 155891256809. The reversal of 155891256808 is 808652198551.

It is not an unprimeable number, because it can be changed into a prime (155891256809) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 5761966 + ... + 5788957.

It is an arithmetic number, because the mean of its divisors is an integer number (10482463530).

Almost surely, 2^155891256808 is an apocalyptic number.

It is an amenable number.

155891256808 is an abundant number, since it is smaller than the sum of its proper divisors (179547576152).

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

155891256808 is a wasteful number, since it uses less digits than its factorization.

155891256808 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11551177 (or 11551173 counting only the distinct ones).

The product of its (nonzero) digits is 6912000, while the sum is 58.

The spelling of 155891256808 in words is "one hundred fifty-five billion, eight hundred ninety-one million, two hundred fifty-six thousand, eight hundred eight".