31889654539 has 4 divisors (see below), whose sum is σ = 32631274456. Its totient is φ = 31148034624.

The previous prime is 31889654519. The next prime is 31889654557. The reversal of 31889654539 is 93545698813.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 31889654539 - 2⁷ = 31889654411 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (31889654509) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 370809894 + ... + 370809979.

It is an arithmetic number, because the mean of its divisors is an integer number (8157818614).

Almost surely, 2^31889654539 is an apocalyptic number.

31889654539 is a deficient number, since it is larger than the sum of its proper divisors (741619917).

31889654539 is an equidigital number, since it uses as much as digits as its factorization.

31889654539 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 741619916.

The product of its digits is 27993600, while the sum is 61.

The spelling of 31889654539 in words is "thirty-one billion, eight hundred eighty-nine million, six hundred fifty-four thousand, five hundred thirty-nine".