31985642674 has 4 divisors (see below), whose sum is σ = 47978464014. Its totient is φ = 15992821336.

The previous prime is 31985642671. The next prime is 31985642723. The reversal of 31985642674 is 47624658913.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 20344743225 + 11640899449 = 142635^2 + 107893^2 .

It is not an unprimeable number, because it can be changed into a prime (31985642671) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 7996410667 + ... + 7996410670.

Almost surely, 2^31985642674 is an apocalyptic number.

31985642674 is a deficient number, since it is larger than the sum of its proper divisors (15992821340).

31985642674 is a wasteful number, since it uses less digits than its factorization.

31985642674 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15992821339.

The product of its digits is 8709120, while the sum is 55.

The spelling of 31985642674 in words is "thirty-one billion, nine hundred eighty-five million, six hundred forty-two thousand, six hundred seventy-four".