78316978758 has 16 divisors (see below), whose sum is σ = 157454032896. Its totient is φ = 25968980360.

The previous prime is 78316978757. The next prime is 78316978771. The reversal of 78316978758 is 85787961387.

It is a super-2 number, since 2×78316978758² (a number of 23 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 78316978692 and 78316978701.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (78316978757) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 34168566 + ... + 34170857.

It is an arithmetic number, because the mean of its divisors is an integer number (9840877056).

Almost surely, 2^78316978758 is an apocalyptic number.

78316978758 is an abundant number, since it is smaller than the sum of its proper divisors (79137054138).

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

78316978758 is a wasteful number, since it uses less digits than its factorization.

78316978758 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 68339619.

The product of its digits is 142248960, while the sum is 69.

The spelling of 78316978758 in words is "seventy-eight billion, three hundred sixteen million, nine hundred seventy-eight thousand, seven hundred fifty-eight".