31577672157 has 8 divisors (see below), whose sum is σ = 42105766560. Its totient is φ = 21050679600.

The previous prime is 31577672149. The next prime is 31577672171. The reversal of 31577672157 is 75127677513.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 31577672157 - 2³ = 31577672149 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (31577671157) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 206094 + ... + 325007.

It is an arithmetic number, because the mean of its divisors is an integer number (5263220820).

Almost surely, 2^31577672157 is an apocalyptic number.

It is an amenable number.

31577672157 is a deficient number, since it is larger than the sum of its proper divisors (10528094403).

31577672157 is a wasteful number, since it uses less digits than its factorization.

31577672157 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 550923.

The product of its digits is 2160900, while the sum is 51.

The spelling of 31577672157 in words is "thirty-one billion, five hundred seventy-seven million, six hundred seventy-two thousand, one hundred fifty-seven".