78440763318 has 8 divisors (see below), whose sum is σ = 156881526648. Its totient is φ = 26146921104.

The previous prime is 78440763283. The next prime is 78440763319. The reversal of 78440763318 is 81336704487.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

78440763318 is an admirable number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (78440763319) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 6536730271 + ... + 6536730282.

It is an arithmetic number, because the mean of its divisors is an integer number (19610190831).

Almost surely, 2^78440763318 is an apocalyptic number.

78440763318 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

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

78440763318 is a wasteful number, since it uses less digits than its factorization.

78440763318 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13073460558.

The product of its (nonzero) digits is 2709504, while the sum is 51.

The spelling of 78440763318 in words is "seventy-eight billion, four hundred forty million, seven hundred sixty-three thousand, three hundred eighteen".