78318506787 has 16 divisors (see below), whose sum is σ = 114699874560. Its totient is φ = 47313696672.

The previous prime is 78318506771. The next prime is 78318506801. The reversal of 78318506787 is 78760581387.

It is not a de Polignac number, because 78318506787 - 2⁴ = 78318506771 is a prime.

It is a super-2 number, since 2×78318506787² (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 78318506787.

It is not an unprimeable number, because it can be changed into a prime (78318506087) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 29868448 + ... + 29871069.

It is an arithmetic number, because the mean of its divisors is an integer number (7168742160).

Almost surely, 2^78318506787 is an apocalyptic number.

78318506787 is a deficient number, since it is larger than the sum of its proper divisors (36381367773).

78318506787 is a wasteful number, since it uses less digits than its factorization.

78318506787 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 59739562.

The product of its (nonzero) digits is 15805440, while the sum is 60.

The spelling of 78318506787 in words is "seventy-eight billion, three hundred eighteen million, five hundred six thousand, seven hundred eighty-seven".