78312567357 has 12 divisors (see below), whose sum is σ = 113128514304. Its totient is φ = 52203596040.

The previous prime is 78312567341. The next prime is 78312567367. The reversal of 78312567357 is 75376521387.

It is a happy number.

78312567357 is a `hidden beast` number, since 7 + 8 + 31 + 256 + 7 + 357 = 666.

It is not a de Polignac number, because 78312567357 - 2⁴ = 78312567341 is a prime.

It is a super-2 number, since 2×78312567357² (a number of 23 digits) contains 22 as substring.

It is a Smith number, since the sum of its digits (54) coincides with the sum of the digits of its prime factors.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (78312567367) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 293343 + ... + 492620.

It is an arithmetic number, because the mean of its divisors is an integer number (9427376192).

Almost surely, 2^78312567357 is an apocalyptic number.

It is an amenable number.

78312567357 is a deficient number, since it is larger than the sum of its proper divisors (34815946947).

78312567357 is a wasteful number, since it uses less digits than its factorization.

78312567357 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 797040 (or 797037 counting only the distinct ones).

The product of its digits is 7408800, while the sum is 54.

The spelling of 78312567357 in words is "seventy-eight billion, three hundred twelve million, five hundred sixty-seven thousand, three hundred fifty-seven".