39790919979 has 8 divisors (see below), whose sum is σ = 58949511120. Its totient is φ = 26527279968.

The previous prime is 39790919873. The next prime is 39790919983. The reversal of 39790919979 is 97991909793.

It is not a de Polignac number, because 39790919979 - 2³¹ = 37643436331 is a prime.

It is not an unprimeable number, because it can be changed into a prime (39790919579) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 736868862 + ... + 736868915.

It is an arithmetic number, because the mean of its divisors is an integer number (7368688890).

Almost surely, 2^39790919979 is an apocalyptic number.

39790919979 is a deficient number, since it is larger than the sum of its proper divisors (19158591141).

39790919979 is a wasteful number, since it uses less digits than its factorization.

39790919979 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1473737786 (or 1473737780 counting only the distinct ones).

The product of its (nonzero) digits is 78121827, while the sum is 72.

The spelling of 39790919979 in words is "thirty-nine billion, seven hundred ninety million, nine hundred nineteen thousand, nine hundred seventy-nine".