78726880465 has 16 divisors (see below), whose sum is σ = 95238037440. Its totient is φ = 62471805120.

The previous prime is 78726880451. The next prime is 78726880469. The reversal of 78726880465 is 56408862787.

It is not a de Polignac number, because 78726880465 - 2⁵ = 78726880433 is a prime.

It is not an unprimeable number, because it can be changed into a prime (78726880469) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 725610 + ... + 827020.

It is an arithmetic number, because the mean of its divisors is an integer number (5952377340).

Almost surely, 2^78726880465 is an apocalyptic number.

It is an amenable number.

78726880465 is a deficient number, since it is larger than the sum of its proper divisors (16511156975).

78726880465 is a wasteful number, since it uses less digits than its factorization.

78726880465 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 102672.

The product of its (nonzero) digits is 36126720, while the sum is 61.

The spelling of 78726880465 in words is "seventy-eight billion, seven hundred twenty-six million, eight hundred eighty thousand, four hundred sixty-five".