7961771697 has 32 divisors (see below), whose sum is σ = 11836800000. Its totient is φ = 4719464640.

The previous prime is 7961771681. The next prime is 7961771729.

7961771697 is nontrivially palindromic in base 10.

It is not a de Polignac number, because 7961771697 - 2⁴ = 7961771681 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 7961771697.

It is not an unprimeable number, because it can be changed into a prime (7961772697) 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, 377179 + ... + 397727.

It is an arithmetic number, because the mean of its divisors is an integer number (369900000).

Almost surely, 2^7961771697 is an apocalyptic number.

It is an amenable number.

7961771697 is a deficient number, since it is larger than the sum of its proper divisors (3875028303).

7961771697 is a wasteful number, since it uses less digits than its factorization.

7961771697 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 20821.

The product of its digits is 7001316, while the sum is 60.

The square root of 7961771697 is about 89228.7604811363. The cubic root of 7961771697 is about 1996.8092202528.

The spelling of 7961771697 in words is "seven billion, nine hundred sixty-one million, seven hundred seventy-one thousand, six hundred ninety-seven".