99642018508 has 12 divisors (see below), whose sum is σ = 174663675592. Its totient is φ = 49738111200.

The previous prime is 99642018473. The next prime is 99642018529. The reversal of 99642018508 is 80581024699.

It is a super-2 number, since 2×99642018508² (a number of 23 digits) contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 20721810 + ... + 20726617.

Almost surely, 2^99642018508 is an apocalyptic number.

It is an amenable number.

99642018508 is a deficient number, since it is larger than the sum of its proper divisors (75021657084).

99642018508 is a wasteful number, since it uses less digits than its factorization.

99642018508 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 41449032 (or 41449030 counting only the distinct ones).

The product of its (nonzero) digits is 1244160, while the sum is 52.

The spelling of 99642018508 in words is "ninety-nine billion, six hundred forty-two million, eighteen thousand, five hundred eight".