9639657055 has 24 divisors (see below), whose sum is σ = 13484430720. Its totient is φ = 6596170560.

The previous prime is 9639657047. The next prime is 9639657091. The reversal of 9639657055 is 5507569369.

It is a happy number.

It is not a de Polignac number, because 9639657055 - 2³ = 9639657047 is a prime.

It is a super-2 number, since 2×9639657055² (a number of 21 digits) contains 22 as substring.

It is a Smith number, since the sum of its digits (55) coincides with the sum of the digits of its prime factors.

It is a junction number, because it is equal to n+sod(n) for n = 9639656987 and 9639657005.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 76285 + ... + 158425.

It is an arithmetic number, because the mean of its divisors is an integer number (561851280).

Almost surely, 2^9639657055 is an apocalyptic number.

9639657055 is a deficient number, since it is larger than the sum of its proper divisors (3844773665).

9639657055 is a wasteful number, since it uses less digits than its factorization.

9639657055 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 82639 (or 82632 counting only the distinct ones).

The product of its (nonzero) digits is 7654500, while the sum is 55.

The square root of 9639657055 is about 98181.7552043148. The cubic root of 9639657055 is about 2128.2396393042.

The spelling of 9639657055 in words is "nine billion, six hundred thirty-nine million, six hundred fifty-seven thousand, fifty-five".