155901555768 has 64 divisors (see below), whose sum is σ = 455791944960. Its totient is φ = 43507408896.

The previous prime is 155901555731. The next prime is 155901555769. The reversal of 155901555768 is 867555109551.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (155901555769) by changing a digit.

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, 10783305 + ... + 10797752.

It is an arithmetic number, because the mean of its divisors is an integer number (7121749140).

Almost surely, 2^155901555768 is an apocalyptic number.

It is an amenable number.

155901555768 is an abundant number, since it is smaller than the sum of its proper divisors (299890389192).

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

155901555768 is a wasteful number, since it uses less digits than its factorization.

155901555768 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 21581116 (or 21581112 counting only the distinct ones).

The product of its (nonzero) digits is 9450000, while the sum is 57.

The spelling of 155901555768 in words is "one hundred fifty-five billion, nine hundred one million, five hundred fifty-five thousand, seven hundred sixty-eight".