39879922499257 has 16 divisors (see below), whose sum is σ = 40507569002880. Its totient is φ = 39254550763392.

The previous prime is 39879922499231. The next prime is 39879922499273. The reversal of 39879922499257 is 75299422997893.

It is a cyclic number.

It is not a de Polignac number, because 39879922499257 - 2⁷ = 39879922499129 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (39879922499057) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 75375843 + ... + 75903079.

It is an arithmetic number, because the mean of its divisors is an integer number (2531723062680).

Almost surely, 2^{39879922499257} is an apocalyptic number.

It is an amenable number.

39879922499257 is a deficient number, since it is larger than the sum of its proper divisors (627646503623).

39879922499257 is a wasteful number, since it uses less digits than its factorization.

39879922499257 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 529392.

The product of its digits is 11110659840, while the sum is 85.

The spelling of 39879922499257 in words is "thirty-nine trillion, eight hundred seventy-nine billion, nine hundred twenty-two million, four hundred ninety-nine thousand, two hundred fifty-seven".