78900634915 has 8 divisors (see below), whose sum is σ = 94704652800. Its totient is φ = 63104580672.

The previous prime is 78900634907. The next prime is 78900634931. The reversal of 78900634915 is 51943600987.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 78900634915 - 2³ = 78900634907 is a prime.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1969090 + ... + 2008759.

It is an arithmetic number, because the mean of its divisors is an integer number (11838081600).

Almost surely, 2^78900634915 is an apocalyptic number.

78900634915 is a deficient number, since it is larger than the sum of its proper divisors (15804017885).

78900634915 is a wasteful number, since it uses less digits than its factorization.

78900634915 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3981821.

The product of its (nonzero) digits is 1632960, while the sum is 52.

The spelling of 78900634915 in words is "seventy-eight billion, nine hundred million, six hundred thirty-four thousand, nine hundred fifteen".