9897762657 has 16 divisors (see below), whose sum is σ = 13238012480. Its totient is φ = 6578044992.

The previous prime is 9897762629. The next prime is 9897762683. The reversal of 9897762657 is 7562677989.

It is not a de Polignac number, because 9897762657 - 2⁸ = 9897762401 is a prime.

It is a super-2 number, since 2×9897762657² (a number of 21 digits) contains 22 as substring.

It is the 99488-th Hogben number.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (9897762607) by changing a digit.

It is a nontrivial repunit in base 99487.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1364043 + ... + 1371279.

It is an arithmetic number, because the mean of its divisors is an integer number (827375780).

Almost surely, 2^9897762657 is an apocalyptic number.

It is an amenable number.

9897762657 is a deficient number, since it is larger than the sum of its proper divisors (3340249823).

9897762657 is a wasteful number, since it uses less digits than its factorization.

9897762657 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8592.

The product of its digits is 80015040, while the sum is 66.

The square root of 9897762657 is about 99487.5000037693. The cubic root of 9897762657 is about 2147.0674030225.

The spelling of 9897762657 in words is "nine billion, eight hundred ninety-seven million, seven hundred sixty-two thousand, six hundred fifty-seven".