7986405957 has 16 divisors (see below), whose sum is σ = 10889075712. Its totient is φ = 5204294640.

The previous prime is 7986405901. The next prime is 7986405971. The reversal of 7986405957 is 7595046897.

It is not a de Polignac number, because 7986405957 - 2⁶ = 7986405893 is a prime.

It is a super-2 number, since 2×7986405957² (a number of 21 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 7986405957.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (7986405157) 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, 74982 + ... + 146952.

It is an arithmetic number, because the mean of its divisors is an integer number (680567232).

Almost surely, 2^7986405957 is an apocalyptic number.

It is an amenable number.

7986405957 is a deficient number, since it is larger than the sum of its proper divisors (2902669755).

7986405957 is a wasteful number, since it uses less digits than its factorization.

7986405957 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 72808.

The product of its (nonzero) digits is 19051200, while the sum is 60.

The square root of 7986405957 is about 89366.6937790584. The cubic root of 7986405957 is about 1998.8665208172.

The spelling of 7986405957 in words is "seven billion, nine hundred eighty-six million, four hundred five thousand, nine hundred fifty-seven".