778382500085 has 32 divisors (see below), whose sum is σ = 1023328823040. Its totient is φ = 566509160448.

The previous prime is 778382500067. The next prime is 778382500087. The reversal of 778382500085 is 580005283877.

It is a cyclic number.

It is not a de Polignac number, because 778382500085 - 2¹⁶ = 778382434549 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (778382500087) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 1518332 + ... + 1965221.

It is an arithmetic number, because the mean of its divisors is an integer number (31979025720).

Almost surely, 2^778382500085 is an apocalyptic number.

It is an amenable number.

778382500085 is a deficient number, since it is larger than the sum of its proper divisors (244946322955).

778382500085 is a wasteful number, since it uses less digits than its factorization.

778382500085 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3483677.

The product of its (nonzero) digits is 3763200, while the sum is 53.

The spelling of 778382500085 in words is "seven hundred seventy-eight billion, three hundred eighty-two million, five hundred thousand, eighty-five".