78126325278 has 16 divisors (see below), whose sum is σ = 156513513600. Its totient is φ = 25998631256.

The previous prime is 78126325253. The next prime is 78126325297. The reversal of 78126325278 is 87252362187.

It is a super-2 number, since 2×78126325278² (a number of 23 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 78126325278.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 10865400 + ... + 10872587.

It is an arithmetic number, because the mean of its divisors is an integer number (9782094600).

Almost surely, 2^78126325278 is an apocalyptic number.

78126325278 is an abundant number, since it is smaller than the sum of its proper divisors (78387188322).

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

78126325278 is a wasteful number, since it uses less digits than its factorization.

78126325278 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 21738591.

The product of its digits is 2257920, while the sum is 51.

The spelling of 78126325278 in words is "seventy-eight billion, one hundred twenty-six million, three hundred twenty-five thousand, two hundred seventy-eight".