78316987158 has 64 divisors (see below), whose sum is σ = 177768864000. Its totient is φ = 25549903872.

The previous prime is 78316987153. The next prime is 78316987181. The reversal of 78316987158 is 85178961387.

It is a super-2 number, since 2×78316987158² (a number of 23 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 78316987095 and 78316987104.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (78316987153) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 669078 + ... + 777366.

It is an arithmetic number, because the mean of its divisors is an integer number (2777638500).

Almost surely, 2^78316987158 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 78316987158, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (88884432000).

78316987158 is an abundant number, since it is smaller than the sum of its proper divisors (99451876842).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

78316987158 is a wasteful number, since it uses less digits than its factorization.

78316987158 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 108586 (or 108580 counting only the distinct ones).

The product of its digits is 20321280, while the sum is 63.

The spelling of 78316987158 in words is "seventy-eight billion, three hundred sixteen million, nine hundred eighty-seven thousand, one hundred fifty-eight".