78158823356 has 12 divisors (see below), whose sum is σ = 136790509800. Its totient is φ = 39075820560.

The previous prime is 78158823343. The next prime is 78158823361. The reversal of 78158823356 is 65332885187.

It is a super-2 number, since 2×78158823356² (a number of 23 digits) contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 848510 + ... + 936101.

It is an arithmetic number, because the mean of its divisors is an integer number (11399209150).

Almost surely, 2^78158823356 is an apocalyptic number.

It is an amenable number.

78158823356 is a deficient number, since it is larger than the sum of its proper divisors (58631686444).

78158823356 is a wasteful number, since it uses less digits than its factorization.

78158823356 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1795564 (or 1795562 counting only the distinct ones).

The product of its digits is 9676800, while the sum is 56.

The spelling of 78158823356 in words is "seventy-eight billion, one hundred fifty-eight million, eight hundred twenty-three thousand, three hundred fifty-six".