78469018815 has 32 divisors (see below), whose sum is σ = 141687014400. Its totient is φ = 36733665920.

The previous prime is 78469018799. The next prime is 78469018861. The reversal of 78469018815 is 51881096487.

It is not a de Polignac number, because 78469018815 - 2⁴ = 78469018799 is a prime.

It is a congruent number.

It is an unprimeable number.

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 31 ways as a sum of consecutive naturals, for example, 8194695 + ... + 8204264.

It is an arithmetic number, because the mean of its divisors is an integer number (4427719200).

Almost surely, 2^78469018815 is an apocalyptic number.

78469018815 is a deficient number, since it is larger than the sum of its proper divisors (63217995585).

78469018815 is a wasteful number, since it uses less digits than its factorization.

78469018815 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 16399007.

The product of its (nonzero) digits is 3870720, while the sum is 57.

The spelling of 78469018815 in words is "seventy-eight billion, four hundred sixty-nine million, eighteen thousand, eight hundred fifteen".