78225603618231 has 16 divisors (see below), whose sum is σ = 116112220362720. Its totient is φ = 52050305661120.

The previous prime is 78225603618209. The next prime is 78225603618259. The reversal of 78225603618231 is 13281630652287.

78225603618231 is a `hidden beast` number, since 7 + 8 + 2 + 2 + 5 + 603 + 6 + 1 + 8 + 23 + 1 = 666.

It is not a de Polignac number, because 78225603618231 - 2⁷ = 78225603618103 is a prime.

It is a super-2 number, since 2×78225603618231² (a number of 29 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (78225603611231) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2780450980 + ... + 2780479113.

It is an arithmetic number, because the mean of its divisors is an integer number (7257013772670).

Almost surely, 2^{78225603618231} is an apocalyptic number.

78225603618231 is a deficient number, since it is larger than the sum of its proper divisors (37886616744489).

78225603618231 is a wasteful number, since it uses less digits than its factorization.

78225603618231 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5560930623 (or 5560930617 counting only the distinct ones).

The product of its (nonzero) digits is 5806080, while the sum is 54.

The spelling of 78225603618231 in words is "seventy-eight trillion, two hundred twenty-five billion, six hundred three million, six hundred eighteen thousand, two hundred thirty-one".