99790499856 has 20 divisors (see below), whose sum is σ = 257792124752. Its totient is φ = 33263499936.

The previous prime is 99790499839. The next prime is 99790499863. The reversal of 99790499856 is 65899409799.

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, 1039484326 + ... + 1039484421.

Almost surely, 2^99790499856 is an apocalyptic number.

It is an amenable number.

99790499856 is an abundant number, since it is smaller than the sum of its proper divisors (158001624896).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

99790499856 is a wasteful number, since it uses less digits than its factorization.

99790499856 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2078968758 (or 2078968752 counting only the distinct ones).

The product of its (nonzero) digits is 396809280, while the sum is 75.

The spelling of 99790499856 in words is "ninety-nine billion, seven hundred ninety million, four hundred ninety-nine thousand, eight hundred fifty-six".