78538621116 has 24 divisors (see below), whose sum is σ = 183424477264. Its totient is φ = 26155584000.

The previous prime is 78538621081. The next prime is 78538621151. The reversal of 78538621116 is 61112683587.

It is an interprime number because it is at equal distance from previous prime (78538621081) and next prime (78538621151).

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2980885 + ... + 3007116.

Almost surely, 2^78538621116 is an apocalyptic number.

It is an amenable number.

78538621116 is an abundant number, since it is smaller than the sum of its proper divisors (104885856148).

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

78538621116 is a wasteful number, since it uses less digits than its factorization.

78538621116 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5989101 (or 5989099 counting only the distinct ones).

The product of its digits is 483840, while the sum is 48.

The spelling of 78538621116 in words is "seventy-eight billion, five hundred thirty-eight million, six hundred twenty-one thousand, one hundred sixteen".