155431631632 has 40 divisors (see below), whose sum is σ = 305033968640. Its totient is φ = 76713661440.

The previous prime is 155431631627. The next prime is 155431631639. The reversal of 155431631632 is 236136134551.

It is a super-2 number, since 2×155431631632² (a number of 23 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (155431631639) 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, 6336832 + ... + 6361312.

It is an arithmetic number, because the mean of its divisors is an integer number (7625849216).

Almost surely, 2^155431631632 is an apocalyptic number.

It is an amenable number.

155431631632 is a deficient number, since it is larger than the sum of its proper divisors (149602337008).

155431631632 is a wasteful number, since it uses less digits than its factorization.

155431631632 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 29591 (or 29585 counting only the distinct ones).

The product of its digits is 194400, while the sum is 40.

The spelling of 155431631632 in words is "one hundred fifty-five billion, four hundred thirty-one million, six hundred thirty-one thousand, six hundred thirty-two".