99690438824 has 8 divisors (see below), whose sum is σ = 186919572810. Its totient is φ = 49845219408.

The previous prime is 99690438767. The next prime is 99690438877. The reversal of 99690438824 is 42883409699.

It can be written as a sum of positive squares in only one way, i.e., 99488514724 + 201924100 = 315418^2 + 14210^2 .

It is a tau number, because it is divible by the number of its divisors (8).

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6230652419 + ... + 6230652434.

Almost surely, 2^99690438824 is an apocalyptic number.

It is an amenable number.

99690438824 is a deficient number, since it is larger than the sum of its proper divisors (87229133986).

99690438824 is a wasteful number, since it uses less digits than its factorization.

99690438824 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12461304859 (or 12461304855 counting only the distinct ones).

The product of its (nonzero) digits is 26873856, while the sum is 62.

The spelling of 99690438824 in words is "ninety-nine billion, six hundred ninety million, four hundred thirty-eight thousand, eight hundred twenty-four".