7697891915 has 12 divisors (see below), whose sum is σ = 10745629056. Its totient is φ = 5278554288.

The previous prime is 7697891897. The next prime is 7697891917. The reversal of 7697891915 is 5191987967.

It is not a de Polignac number, because 7697891915 - 2¹² = 7697887819 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (7697891917) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 15709739 + ... + 15710228.

It is an arithmetic number, because the mean of its divisors is an integer number (895469088).

Almost surely, 2^7697891915 is an apocalyptic number.

7697891915 is a deficient number, since it is larger than the sum of its proper divisors (3047737141).

7697891915 is a wasteful number, since it uses less digits than its factorization.

7697891915 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 31419986 (or 31419979 counting only the distinct ones).

The product of its digits is 8573040, while the sum is 62.

The square root of 7697891915 is about 87737.6311225691. The cubic root of 7697891915 is about 1974.5005981876.

The spelling of 7697891915 in words is "seven billion, six hundred ninety-seven million, eight hundred ninety-one thousand, nine hundred fifteen".