778637374490 has 16 divisors (see below), whose sum is σ = 1402344092160. Its totient is φ = 311277879120.

The previous prime is 778637374397. The next prime is 778637374499. The reversal of 778637374490 is 94473736877.

778637374490 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not an unprimeable number, because it can be changed into a prime (778637374499) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 22115366 + ... + 22150545.

It is an arithmetic number, because the mean of its divisors is an integer number (87646505760).

Almost surely, 2^778637374490 is an apocalyptic number.

778637374490 is a deficient number, since it is larger than the sum of its proper divisors (623706717670).

778637374490 is a wasteful number, since it uses less digits than its factorization.

778637374490 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 44267677.

The product of its (nonzero) digits is 149361408, while the sum is 65.

The spelling of 778637374490 in words is "seven hundred seventy-eight billion, six hundred thirty-seven million, three hundred seventy-four thousand, four hundred ninety".