99878340512 has 48 divisors (see below), whose sum is σ = 211803766272. Its totient is φ = 46226991360.

The previous prime is 99878340509. The next prime is 99878340521. The reversal of 99878340512 is 21504387899.

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, 2165963 + ... + 2211594.

It is an arithmetic number, because the mean of its divisors is an integer number (4412578464).

Almost surely, 2^99878340512 is an apocalyptic number.

99878340512 is a gapful number since it is divisible by the number (92) formed by its first and last digit.

It is an amenable number.

99878340512 is an abundant number, since it is smaller than the sum of its proper divisors (111925425760).

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

99878340512 is a wasteful number, since it uses less digits than its factorization.

99878340512 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4377621 (or 4377613 counting only the distinct ones).

The product of its (nonzero) digits is 4354560, while the sum is 56.

The spelling of 99878340512 in words is "ninety-nine billion, eight hundred seventy-eight million, three hundred forty thousand, five hundred twelve".