155806115864 has 16 divisors (see below), whose sum is σ = 333870248400. Its totient is φ = 66774049632.

The previous prime is 155806115837. The next prime is 155806115887. The reversal of 155806115864 is 468511608551.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1391125979 + ... + 1391126090.

It is an arithmetic number, because the mean of its divisors is an integer number (20866890525).

Almost surely, 2^155806115864 is an apocalyptic number.

155806115864 is a gapful number since it is divisible by the number (14) formed by its first and last digit.

It is an amenable number.

155806115864 is an abundant number, since it is smaller than the sum of its proper divisors (178064132536).

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

155806115864 is a wasteful number, since it uses less digits than its factorization.

155806115864 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2782252082 (or 2782252078 counting only the distinct ones).

The product of its (nonzero) digits is 1152000, while the sum is 50.

The spelling of 155806115864 in words is "one hundred fifty-five billion, eight hundred six million, one hundred fifteen thousand, eight hundred sixty-four".