39920537951279 has 4 divisors (see below), whose sum is σ = 39946612765320. Its totient is φ = 39894463137240.

The previous prime is 39920537951269. The next prime is 39920537951381. The reversal of 39920537951279 is 97215973502993.

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 39920537951279 - 2⁸ = 39920537951023 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (39920537951269) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 13037404724 + ... + 13037407785.

It is an arithmetic number, because the mean of its divisors is an integer number (9986653191330).

Almost surely, 2^{39920537951279} is an apocalyptic number.

39920537951279 is a deficient number, since it is larger than the sum of its proper divisors (26074814041).

39920537951279 is a wasteful number, since it uses less digits than its factorization.

39920537951279 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 26074814040.

The product of its (nonzero) digits is 289340100, while the sum is 71.

The spelling of 39920537951279 in words is "thirty-nine trillion, nine hundred twenty billion, five hundred thirty-seven million, nine hundred fifty-one thousand, two hundred seventy-nine".