778882512730 has 32 divisors (see below), whose sum is σ = 1603527497856. Its totient is φ = 266836282944.

The previous prime is 778882512719. The next prime is 778882512769. The reversal of 778882512730 is 37215288877.

It is a super-2 number, since 2×778882512730² (a number of 25 digits) contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 4267264 + ... + 4446043.

It is an arithmetic number, because the mean of its divisors is an integer number (50110234308).

Almost surely, 2^778882512730 is an apocalyptic number.

778882512730 is a gapful number since it is divisible by the number (70) formed by its first and last digit.

778882512730 is an abundant number, since it is smaller than the sum of its proper divisors (824644985126).

778882512730 is a wasteful number, since it uses less digits than its factorization.

778882512730 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8714598.

The product of its (nonzero) digits is 10536960, while the sum is 58.

The spelling of 778882512730 in words is "seven hundred seventy-eight billion, eight hundred eighty-two million, five hundred twelve thousand, seven hundred thirty".