78625563231 has 4 divisors (see below), whose sum is σ = 104834084312. Its totient is φ = 52417042152.

The previous prime is 78625563217. The next prime is 78625563239. The reversal of 78625563231 is 13236552687.

It is a happy number.

It is a semiprime because it is the product of two primes.

It is not a de Polignac number, because 78625563231 - 2¹⁷ = 78625432159 is a prime.

It is a super-2 number, since 2×78625563231² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (78625563239) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 13104260536 + ... + 13104260541.

It is an arithmetic number, because the mean of its divisors is an integer number (26208521078).

Almost surely, 2^78625563231 is an apocalyptic number.

78625563231 is a deficient number, since it is larger than the sum of its proper divisors (26208521081).

78625563231 is a wasteful number, since it uses less digits than its factorization.

78625563231 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 26208521080.

The product of its digits is 1814400, while the sum is 48.

The spelling of 78625563231 in words is "seventy-eight billion, six hundred twenty-five million, five hundred sixty-three thousand, two hundred thirty-one".