31669609890 has 16 divisors (see below), whose sum is σ = 76007063808. Its totient is φ = 8445229296.

The previous prime is 31669609883. The next prime is 31669609919. The reversal of 31669609890 is 9890696613.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 31669609890.

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, 527826802 + ... + 527826861.

It is an arithmetic number, because the mean of its divisors is an integer number (4750441488).

Almost surely, 2^31669609890 is an apocalyptic number.

31669609890 is a gapful number since it is divisible by the number (30) formed by its first and last digit.

31669609890 is an abundant number, since it is smaller than the sum of its proper divisors (44337453918).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

31669609890 is a wasteful number, since it uses less digits than its factorization.

31669609890 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1055653673.

The product of its (nonzero) digits is 3779136, while the sum is 57.

The spelling of 31669609890 in words is "thirty-one billion, six hundred sixty-nine million, six hundred nine thousand, eight hundred ninety".