39980686391 has 8 divisors (see below), whose sum is σ = 41280778368. Its totient is φ = 38681244000.

The previous prime is 39980686387. The next prime is 39980686393. The reversal of 39980686391 is 19368608993.

39980686391 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 39980686391 - 2² = 39980686387 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 (39980686393) 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, 35720 + ... + 285021.

It is an arithmetic number, because the mean of its divisors is an integer number (5160097296).

Almost surely, 2^39980686391 is an apocalyptic number.

39980686391 is a gapful number since it is divisible by the number (31) formed by its first and last digit.

39980686391 is a deficient number, since it is larger than the sum of its proper divisors (1300091977).

39980686391 is a wasteful number, since it uses less digits than its factorization.

39980686391 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 324793.

The product of its (nonzero) digits is 15116544, while the sum is 62.

The spelling of 39980686391 in words is "thirty-nine billion, nine hundred eighty million, six hundred eighty-six thousand, three hundred ninety-one".