99906559840 has 48 divisors (see below), whose sum is σ = 237477341808. Its totient is φ = 39717444096.

The previous prime is 99906559811. The next prime is 99906559859. The reversal of 99906559840 is 4895560999.

It is a happy number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1889307 + ... + 1941466.

It is an arithmetic number, because the mean of its divisors is an integer number (4947444621).

Almost surely, 2^99906559840 is an apocalyptic number.

It is an amenable number.

99906559840 is an abundant number, since it is smaller than the sum of its proper divisors (137570781968).

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

99906559840 is a wasteful number, since it uses less digits than its factorization.

99906559840 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3830951 (or 3830943 counting only the distinct ones).

The product of its (nonzero) digits is 31492800, while the sum is 64.

The spelling of 99906559840 in words is "ninety-nine billion, nine hundred six million, five hundred fifty-nine thousand, eight hundred forty".