7972816605 has 16 divisors (see below), whose sum is σ = 13737776640. Its totient is φ = 3925078848.

The previous prime is 7972816589. The next prime is 7972816609. The reversal of 7972816605 is 5066182797.

It is not a de Polignac number, because 7972816605 - 2⁴ = 7972816589 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (7972816609) 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, 20442925 + ... + 20443314.

It is an arithmetic number, because the mean of its divisors is an integer number (858611040).

Almost surely, 2^7972816605 is an apocalyptic number.

It is an amenable number.

7972816605 is a deficient number, since it is larger than the sum of its proper divisors (5764960035).

7972816605 is a wasteful number, since it uses less digits than its factorization.

7972816605 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 40886260.

The product of its (nonzero) digits is 1270080, while the sum is 51.

The square root of 7972816605 is about 89290.6299955376. The cubic root of 7972816605 is about 1997.7321464755.

The spelling of 7972816605 in words is "seven billion, nine hundred seventy-two million, eight hundred sixteen thousand, six hundred five".