31490426779 has 12 divisors (see below), whose sum is σ = 36676277904. Its totient is φ = 26958963024.

The previous prime is 31490426767. The next prime is 31490426783. The reversal of 31490426779 is 97762409413.

It is not a de Polignac number, because 31490426779 - 2⁹ = 31490426267 is a prime.

It is not an unprimeable number, because it can be changed into a prime (31490426579) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 350112 + ... + 430765.

It is an arithmetic number, because the mean of its divisors is an integer number (3056356492).

Almost surely, 2^31490426779 is an apocalyptic number.

31490426779 is a deficient number, since it is larger than the sum of its proper divisors (5185851125).

31490426779 is an equidigital number, since it uses as much as digits as its factorization.

31490426779 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 781714 (or 781707 counting only the distinct ones).

The product of its (nonzero) digits is 2286144, while the sum is 52.

The spelling of 31490426779 in words is "thirty-one billion, four hundred ninety million, four hundred twenty-six thousand, seven hundred seventy-nine".