78759365787 has 18 divisors (see below), whose sum is σ = 114066360252. Its totient is φ = 52366845384.

The previous prime is 78759365779. The next prime is 78759365791. The reversal of 78759365787 is 78756395787.

It is not a de Polignac number, because 78759365787 - 2³ = 78759365779 is a prime.

It is a super-2 number, since 2×78759365787² (a number of 23 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (78759365767) by changing a digit.

It is a polite number, since it can be written in 17 ways as a sum of consecutive naturals, for example, 1262308 + ... + 1323230.

It is an arithmetic number, because the mean of its divisors is an integer number (6337020014).

Almost surely, 2^78759365787 is an apocalyptic number.

78759365787 is a deficient number, since it is larger than the sum of its proper divisors (35306994465).

78759365787 is an equidigital number, since it uses as much as digits as its factorization.

78759365787 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 61687 (or 61305 counting only the distinct ones).

The product of its digits is 622339200, while the sum is 72.

The spelling of 78759365787 in words is "seventy-eight billion, seven hundred fifty-nine million, three hundred sixty-five thousand, seven hundred eighty-seven".