78884731450725 has 48 divisors (see below), whose sum is σ = 134664646577664. Its totient is φ = 40704204672000.

The previous prime is 78884731450673. The next prime is 78884731450741. The reversal of 78884731450725 is 52705413748887.

It is not a de Polignac number, because 78884731450725 - 2⁷ = 78884731450597 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 78884731450725.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 4652169 + ... + 13394481.

It is an arithmetic number, because the mean of its divisors is an integer number (2805513470368).

Almost surely, 2^{78884731450725} is an apocalyptic number.

78884731450725 is a gapful number since it is divisible by the number (75) formed by its first and last digit.

It is an amenable number.

78884731450725 is a deficient number, since it is larger than the sum of its proper divisors (55779915126939).

78884731450725 is a wasteful number, since it uses less digits than its factorization.

78884731450725 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8746238 (or 8746233 counting only the distinct ones).

The product of its (nonzero) digits is 421478400, while the sum is 69.

The spelling of 78884731450725 in words is "seventy-eight trillion, eight hundred eighty-four billion, seven hundred thirty-one million, four hundred fifty thousand, seven hundred twenty-five".