7997289915 has 32 divisors (see below), whose sum is σ = 12859140096. Its totient is φ = 4244119040.

The previous prime is 7997289899. The next prime is 7997289917. The reversal of 7997289915 is 5199827997.

It is not a de Polignac number, because 7997289915 - 2⁴ = 7997289899 is a prime.

It is not an unprimeable number, because it can be changed into a prime (7997289917) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 3085270 + ... + 3087860.

It is an arithmetic number, because the mean of its divisors is an integer number (401848128).

Almost surely, 2^7997289915 is an apocalyptic number.

7997289915 is a deficient number, since it is larger than the sum of its proper divisors (4861850181).

7997289915 is a wasteful number, since it uses less digits than its factorization.

7997289915 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3539.

The product of its digits is 25719120, while the sum is 66.

The square root of 7997289915 is about 89427.5679810203. The cubic root of 7997289915 is about 1999.7741340766.

The spelling of 7997289915 in words is "seven billion, nine hundred ninety-seven million, two hundred eighty-nine thousand, nine hundred fifteen".