31716920546 has 4 divisors (see below), whose sum is σ = 47575380822. Its totient is φ = 15858460272.

The previous prime is 31716920531. The next prime is 31716920563. The reversal of 31716920546 is 64502961713.

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., 17466529921 + 14250390625 = 132161^2 + 119375^2 .

It is a junction number, because it is equal to n+sod(n) for n = 31716920497 and 31716920506.

It is an unprimeable number.

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 as a sum of consecutive naturals, namely, 7929230135 + ... + 7929230138.

Almost surely, 2^31716920546 is an apocalyptic number.

31716920546 is a deficient number, since it is larger than the sum of its proper divisors (15858460276).

31716920546 is a wasteful number, since it uses less digits than its factorization.

31716920546 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15858460275.

The product of its (nonzero) digits is 272160, while the sum is 44.

The spelling of 31716920546 in words is "thirty-one billion, seven hundred sixteen million, nine hundred twenty thousand, five hundred forty-six".