78800728217995 has 16 divisors (see below), whose sum is σ = 108073271401920. Its totient is φ = 54032934426624.

The previous prime is 78800728217987. The next prime is 78800728217999. The reversal of 78800728217995 is 59971282700887.

It is a cyclic number.

It is not a de Polignac number, because 78800728217995 - 2³ = 78800728217987 is a prime.

It is not an unprimeable number, because it can be changed into a prime (78800728217999) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 37518022 + ... + 39562651.

It is an arithmetic number, because the mean of its divisors is an integer number (6754579462620).

Almost surely, 2^{78800728217995} is an apocalyptic number.

78800728217995 is a deficient number, since it is larger than the sum of its proper divisors (29272543183925).

78800728217995 is a wasteful number, since it uses less digits than its factorization.

78800728217995 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 77109894.

The product of its (nonzero) digits is 284497920, while the sum is 73.

The spelling of 78800728217995 in words is "seventy-eight trillion, eight hundred billion, seven hundred twenty-eight million, two hundred seventeen thousand, nine hundred ninety-five".