99100639890 has 80 divisors (see below), whose sum is σ = 304537856832. Its totient is φ = 22651573536.

The previous prime is 99100639889. The next prime is 99100639903. The reversal of 99100639890 is 9893600199.

It is a Harshad number since it is a multiple of its sum of digits (54).

It is an unprimeable number.

It is a polite number, since it can be written in 39 ways as a sum of consecutive naturals, for example, 8733364 + ... + 8744703.

Almost surely, 2^99100639890 is an apocalyptic number.

99100639890 is a gapful number since it is divisible by the number (90) formed by its first and last digit.

99100639890 is an abundant number, since it is smaller than the sum of its proper divisors (205437216942).

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

99100639890 is a wasteful number, since it uses less digits than its factorization.

99100639890 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 17478093 (or 17478084 counting only the distinct ones).

The product of its (nonzero) digits is 944784, while the sum is 54.

The spelling of 99100639890 in words is "ninety-nine billion, one hundred million, six hundred thirty-nine thousand, eight hundred ninety".