31590161889 has 32 divisors (see below), whose sum is σ = 52394719104. Its totient is φ = 16633236480.

The previous prime is 31590161857. The next prime is 31590161929. The reversal of 31590161889 is 98816109513.

It is not a de Polignac number, because 31590161889 - 2⁵ = 31590161857 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (51).

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (31590169889) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 2158494 + ... + 2173079.

It is an arithmetic number, because the mean of its divisors is an integer number (1637334972).

Almost surely, 2^31590161889 is an apocalyptic number.

31590161889 is a gapful number since it is divisible by the number (39) formed by its first and last digit.

It is an amenable number.

31590161889 is a deficient number, since it is larger than the sum of its proper divisors (20804557215).

31590161889 is a wasteful number, since it uses less digits than its factorization.

31590161889 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4331617.

The product of its (nonzero) digits is 466560, while the sum is 51.

The spelling of 31590161889 in words is "thirty-one billion, five hundred ninety million, one hundred sixty-one thousand, eight hundred eighty-nine".