31628494779 has 32 divisors (see below), whose sum is σ = 49934016000. Its totient is φ = 17423503104.

The previous prime is 31628494757. The next prime is 31628494783. The reversal of 31628494779 is 97749482613.

It is not a de Polignac number, because 31628494779 - 2²⁸ = 31360059323 is a prime.

It is not an unprimeable number, because it can be changed into a prime (31628494739) 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, 361927 + ... + 440735.

It is an arithmetic number, because the mean of its divisors is an integer number (1560438000).

Almost surely, 2^31628494779 is an apocalyptic number.

31628494779 is a deficient number, since it is larger than the sum of its proper divisors (18305521221).

31628494779 is a wasteful number, since it uses less digits than its factorization.

31628494779 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 79507.

The product of its digits is 18289152, while the sum is 60.

The spelling of 31628494779 in words is "thirty-one billion, six hundred twenty-eight million, four hundred ninety-four thousand, seven hundred seventy-nine".