31678013957 has 8 divisors (see below), whose sum is σ = 32432573184. Its totient is φ = 30924266688.

The previous prime is 31678013953. The next prime is 31678013963. The reversal of 31678013957 is 75931087613.

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

It is a cyclic number.

It is not a de Polignac number, because 31678013957 - 2² = 31678013953 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (31678013951) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 123668 + ... + 280445.

It is an arithmetic number, because the mean of its divisors is an integer number (4054071648).

Almost surely, 2^31678013957 is an apocalyptic number.

It is an amenable number.

31678013957 is a deficient number, since it is larger than the sum of its proper divisors (754559227).

31678013957 is a wasteful number, since it uses less digits than its factorization.

31678013957 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 405979.

The product of its (nonzero) digits is 952560, while the sum is 50.

The spelling of 31678013957 in words is "thirty-one billion, six hundred seventy-eight million, thirteen thousand, nine hundred fifty-seven".