99659961550 has 12 divisors (see below), whose sum is σ = 185367528576. Its totient is φ = 39863984600.

The previous prime is 99659961517. The next prime is 99659961551. The reversal of 99659961550 is 5516995699.

It is a super-2 number, since 2×99659961550² (a number of 23 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (99659961551) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 996599566 + ... + 996599665.

It is an arithmetic number, because the mean of its divisors is an integer number (15447294048).

Almost surely, 2^99659961550 is an apocalyptic number.

99659961550 is a deficient number, since it is larger than the sum of its proper divisors (85707567026).

99659961550 is a wasteful number, since it uses less digits than its factorization.

99659961550 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1993199243 (or 1993199238 counting only the distinct ones).

The product of its (nonzero) digits is 29524500, while the sum is 64.

The spelling of 99659961550 in words is "ninety-nine billion, six hundred fifty-nine million, nine hundred sixty-one thousand, five hundred fifty".