31649923707 has 16 divisors (see below), whose sum is σ = 43021870080. Its totient is φ = 20691788832.

The previous prime is 31649923699. The next prime is 31649923709. The reversal of 31649923707 is 70732994613.

It is not a de Polignac number, because 31649923707 - 2³ = 31649923699 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 31649923707.

It is not an unprimeable number, because it can be changed into a prime (31649923709) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 308232 + ... + 397877.

It is an arithmetic number, because the mean of its divisors is an integer number (2688866880).

Almost surely, 2^31649923707 is an apocalyptic number.

31649923707 is a deficient number, since it is larger than the sum of its proper divisors (11371946373).

31649923707 is a wasteful number, since it uses less digits than its factorization.

31649923707 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 706402.

The product of its (nonzero) digits is 1714608, while the sum is 51.

The spelling of 31649923707 in words is "thirty-one billion, six hundred forty-nine million, nine hundred twenty-three thousand, seven hundred seven".