78789137875 has 32 divisors (see below), whose sum is σ = 112958322048. Its totient is φ = 53746790400.

The previous prime is 78789137837. The next prime is 78789137891. The reversal of 78789137875 is 57873198787.

It is a de Polignac number, because none of the positive numbers 2^k-78789137875 is a prime.

It is a Duffinian number.

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, 64402 + ... + 402151.

It is an arithmetic number, because the mean of its divisors is an integer number (3529947564).

Almost surely, 2^78789137875 is an apocalyptic number.

78789137875 is a deficient number, since it is larger than the sum of its proper divisors (34169184173).

78789137875 is a wasteful number, since it uses less digits than its factorization.

78789137875 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 466768 (or 466758 counting only the distinct ones).

The product of its digits is 165957120, while the sum is 70.

The spelling of 78789137875 in words is "seventy-eight billion, seven hundred eighty-nine million, one hundred thirty-seven thousand, eight hundred seventy-five".