78808698025 has 6 divisors (see below), whose sum is σ = 97722785582. Its totient is φ = 63046958400.

The previous prime is 78808697999. The next prime is 78808698037. The reversal of 78808698025 is 52089680887.

It can be written as a sum of positive squares in 3 ways, for example, as 4456497049 + 74352200976 = 66757^2 + 272676^2 .

It is not a de Polignac number, because 78808698025 - 2²⁵ = 78775143593 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 1576173936 + ... + 1576173985.

Almost surely, 2^78808698025 is an apocalyptic number.

It is an amenable number.

78808698025 is a deficient number, since it is larger than the sum of its proper divisors (18914087557).

78808698025 is a wasteful number, since it uses less digits than its factorization.

78808698025 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3152347931 (or 3152347926 counting only the distinct ones).

The product of its (nonzero) digits is 15482880, while the sum is 61.

The spelling of 78808698025 in words is "seventy-eight billion, eight hundred eight million, six hundred ninety-eight thousand, twenty-five".