79321866625 has 16 divisors (see below), whose sum is σ = 99649300608. Its totient is φ = 63037230000.

The previous prime is 79321866581. The next prime is 79321866643. The reversal of 79321866625 is 52666812397.

It is not a de Polignac number, because 79321866625 - 2¹³ = 79321858433 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2082367 + ... + 2120116.

It is an arithmetic number, because the mean of its divisors is an integer number (6228081288).

Almost surely, 2^79321866625 is an apocalyptic number.

It is an amenable number.

79321866625 is a deficient number, since it is larger than the sum of its proper divisors (20327433983).

79321866625 is a wasteful number, since it uses less digits than its factorization.

79321866625 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4202649 (or 4202639 counting only the distinct ones).

The product of its digits is 6531840, while the sum is 55.

The spelling of 79321866625 in words is "seventy-nine billion, three hundred twenty-one million, eight hundred sixty-six thousand, six hundred twenty-five".