78956746140 has 24 divisors (see below), whose sum is σ = 221078889360. Its totient is φ = 21055132288.

The previous prime is 78956746117. The next prime is 78956746159. The reversal of 78956746140 is 4164765987.

It is a super-2 number, since 2×78956746140² (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 7 ways as a sum of consecutive naturals, for example, 657972825 + ... + 657972944.

It is an arithmetic number, because the mean of its divisors is an integer number (9211620390).

Almost surely, 2^78956746140 is an apocalyptic number.

It is an amenable number.

78956746140 is an abundant number, since it is smaller than the sum of its proper divisors (142122143220).

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

78956746140 is a wasteful number, since it uses less digits than its factorization.

78956746140 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1315945781 (or 1315945779 counting only the distinct ones).

The product of its (nonzero) digits is 10160640, while the sum is 57.

The spelling of 78956746140 in words is "seventy-eight billion, nine hundred fifty-six million, seven hundred forty-six thousand, one hundred forty".