99609009957 has 8 divisors (see below), whose sum is σ = 147568903680. Its totient is φ = 66406006620.

The previous prime is 99609009953. The next prime is 99609009961. The reversal of 99609009957 is 75990090699.

It is an interprime number because it is at equal distance from previous prime (99609009953) and next prime (99609009961).

It is not a de Polignac number, because 99609009957 - 2² = 99609009953 is a prime.

It is a super-2 number, since 2×99609009957² (a number of 23 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 99609009894 and 99609009903.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (99609009953) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1844611269 + ... + 1844611322.

It is an arithmetic number, because the mean of its divisors is an integer number (18446112960).

Almost surely, 2^99609009957 is an apocalyptic number.

It is an amenable number.

99609009957 is a deficient number, since it is larger than the sum of its proper divisors (47959893723).

99609009957 is a wasteful number, since it uses less digits than its factorization.

99609009957 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3689222600 (or 3689222594 counting only the distinct ones).

The product of its (nonzero) digits is 12400290, while the sum is 63.

The spelling of 99609009957 in words is "ninety-nine billion, six hundred nine million, nine thousand, nine hundred fifty-seven".