78515616475 has 24 divisors (see below), whose sum is σ = 103260556080. Its totient is φ = 59017758720.

The previous prime is 78515616427. The next prime is 78515616497. The reversal of 78515616475 is 57461651587.

It is a de Polignac number, because none of the positive numbers 2^k-78515616475 is a prime.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 96256 + ... + 407794.

It is an arithmetic number, because the mean of its divisors is an integer number (4302523170).

Almost surely, 2^78515616475 is an apocalyptic number.

78515616475 is a deficient number, since it is larger than the sum of its proper divisors (24744939605).

78515616475 is a wasteful number, since it uses less digits than its factorization.

78515616475 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 312159 (or 312154 counting only the distinct ones).

The product of its digits is 7056000, while the sum is 55.

The spelling of 78515616475 in words is "seventy-eight billion, five hundred fifteen million, six hundred sixteen thousand, four hundred seventy-five".