99678692880 has 160 divisors (see below), whose sum is σ = 369748417920. Its totient is φ = 24536286720.

The previous prime is 99678692863. The next prime is 99678692947. The reversal of 99678692880 is 8829687699.

It is a Harshad number since it is a multiple of its sum of digits (72).

It is a junction number, because it is equal to n+sod(n) for n = 99678692799 and 99678692808.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 1746826 + ... + 1802985.

It is an arithmetic number, because the mean of its divisors is an integer number (2310927612).

Almost surely, 2^99678692880 is an apocalyptic number.

99678692880 is a gapful number since it is divisible by the number (90) formed by its first and last digit.

It is an amenable number.

99678692880 is an abundant number, since it is smaller than the sum of its proper divisors (270069725040).

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

99678692880 is a wasteful number, since it uses less digits than its factorization.

99678692880 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3549846 (or 3549834 counting only the distinct ones).

The product of its (nonzero) digits is 188116992, while the sum is 72.

The spelling of 99678692880 in words is "ninety-nine billion, six hundred seventy-eight million, six hundred ninety-two thousand, eight hundred eighty".