7779684012 has 48 divisors (see below), whose sum is σ = 18592949760. Its totient is φ = 2530438848.

The previous prime is 7779683999. The next prime is 7779684037. The reversal of 7779684012 is 2104869777.

It is a super-2 number, since 2×7779684012² (a number of 21 digits) contains 22 as substring.

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 15 ways as a sum of consecutive naturals, for example, 562314 + ... + 575982.

It is an arithmetic number, because the mean of its divisors is an integer number (387353120).

Almost surely, 2^7779684012 is an apocalyptic number.

It is an amenable number.

7779684012 is an abundant number, since it is smaller than the sum of its proper divisors (10813265748).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

7779684012 is a wasteful number, since it uses less digits than its factorization.

7779684012 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14822 (or 14820 counting only the distinct ones).

The product of its (nonzero) digits is 1185408, while the sum is 51.

The square root of 7779684012 is about 88202.5170389145. The cubic root of 7779684012 is about 1981.4691687579.

The spelling of 7779684012 in words is "seven billion, seven hundred seventy-nine million, six hundred eighty-four thousand, twelve".