9651994965 has 192 divisors, whose sum is σ = 19580313600. Its totient is φ = 4488130944.

The previous prime is 9651994949. The next prime is 9651995039. The reversal of 9651994965 is 5694991569.

9651994965 is a `hidden beast` number, since 9 + 6 + 51 + 99 + 496 + 5 = 666.

It is not a de Polignac number, because 9651994965 - 2⁴ = 9651994949 is a prime.

It is a super-2 number, since 2×9651994965² (a number of 21 digits) contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 191 ways as a sum of consecutive naturals, for example, 163593106 + ... + 163593164.

It is an arithmetic number, because the mean of its divisors is an integer number (101980800).

Almost surely, 2^9651994965 is an apocalyptic number.

9651994965 is a gapful number since it is divisible by the number (95) formed by its first and last digit.

It is an amenable number.

9651994965 is an abundant number, since it is smaller than the sum of its proper divisors (9928318635).

9651994965 is a wasteful number, since it uses less digits than its factorization.

9651994965 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 221 (or 156 counting only the distinct ones).

The product of its digits is 23619600, while the sum is 63.

The square root of 9651994965 is about 98244.5671016978. The cubic root of 9651994965 is about 2129.1472384813.

The spelling of 9651994965 in words is "nine billion, six hundred fifty-one million, nine hundred ninety-four thousand, nine hundred sixty-five".