2777399980 has 12 divisors (see below), whose sum is σ = 5832540000. Its totient is φ = 1110959984.

The previous prime is 2777399941. The next prime is 2777399987. The reversal of 2777399980 is 899937772.

It is not an unprimeable number, because it can be changed into a prime (2777399987) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 69434980 + ... + 69435019.

It is an arithmetic number, because the mean of its divisors is an integer number (486045000).

Almost surely, 2^2777399980 is an apocalyptic number.

2777399980 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

2777399980 is an abundant number, since it is smaller than the sum of its proper divisors (3055140020).

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

2777399980 is a wasteful number, since it uses less digits than its factorization.

2777399980 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 138870008 (or 138870006 counting only the distinct ones).

The product of its (nonzero) digits is 12002256, while the sum is 61.

The square root of 2777399980 is about 52701.0434431805. The cubic root of 2777399980 is about 1405.6573765495.

The spelling of 2777399980 in words is "two billion, seven hundred seventy-seven million, three hundred ninety-nine thousand, nine hundred eighty".