31690493546 has 16 divisors (see below), whose sum is σ = 48653313984. Its totient is φ = 15472905504.

The previous prime is 31690493539. The next prime is 31690493561. The reversal of 31690493546 is 64539409613.

It is a happy number.

It is a junction number, because it is equal to n+sod(n) for n = 31690493494 and 31690493503.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 318971 + ... + 406353.

It is an arithmetic number, because the mean of its divisors is an integer number (3040832124).

Almost surely, 2^31690493546 is an apocalyptic number.

31690493546 is a deficient number, since it is larger than the sum of its proper divisors (16962820438).

31690493546 is a wasteful number, since it uses less digits than its factorization.

31690493546 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 91645.

The product of its (nonzero) digits is 2099520, while the sum is 50.

The spelling of 31690493546 in words is "thirty-one billion, six hundred ninety million, four hundred ninety-three thousand, five hundred forty-six".