78504570721325 has 96 divisors (see below), whose sum is σ = 116600152112640. Its totient is φ = 51264788889600.

The previous prime is 78504570721271. The next prime is 78504570721327. The reversal of 78504570721325 is 52312707540587.

It is a happy number.

It is not a de Polignac number, because 78504570721325 - 2²⁶ = 78504503612461 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (78504570721327) by changing a digit.

It is a polite number, since it can be written in 95 ways as a sum of consecutive naturals, for example, 2152620191 + ... + 2152656659.

It is an arithmetic number, because the mean of its divisors is an integer number (1214584917840).

Almost surely, 2^{78504570721325} is an apocalyptic number.

It is an amenable number.

78504570721325 is a deficient number, since it is larger than the sum of its proper divisors (38095581391315).

78504570721325 is a wasteful number, since it uses less digits than its factorization.

78504570721325 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 38847 (or 38842 counting only the distinct ones).

The product of its (nonzero) digits is 16464000, while the sum is 56.

The spelling of 78504570721325 in words is "seventy-eight trillion, five hundred four billion, five hundred seventy million, seven hundred twenty-one thousand, three hundred twenty-five".