7961881697 has 16 divisors (see below), whose sum is σ = 9930579072. Its totient is φ = 6201515520.

The previous prime is 7961881691. The next prime is 7961881721.

7961881697 is nontrivially palindromic in base 10.

It is a cyclic number.

It is not a de Polignac number, because 7961881697 - 2⁶ = 7961881633 is a prime.

It is a Smith number, since the sum of its digits (62) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (7961881691) 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, 179723 + ... + 219599.

It is an arithmetic number, because the mean of its divisors is an integer number (620661192).

Almost surely, 2^7961881697 is an apocalyptic number.

7961881697 is a gapful number since it is divisible by the number (77) formed by its first and last digit.

It is an amenable number.

7961881697 is a deficient number, since it is larger than the sum of its proper divisors (1968697375).

7961881697 is a wasteful number, since it uses less digits than its factorization.

7961881697 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 42488.

The product of its digits is 9144576, while the sum is 62.

The square root of 7961881697 is about 89229.3768721938. The cubic root of 7961881697 is about 1996.8184161960.

The spelling of 7961881697 in words is "seven billion, nine hundred sixty-one million, eight hundred eighty-one thousand, six hundred ninety-seven".