2618844980 has 18 divisors (see below), whose sum is σ = 5500055106. Its totient is φ = 1047446448.

The previous prime is 2618844959. The next prime is 2618844983. The reversal of 2618844980 is 894488162.

It can be written as a sum of positive squares in only one way, i.e., 2095075984 + 523768996 = 45772^2 + 22886^2 .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2618844983) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 223139 + ... + 234581.

It is an arithmetic number, because the mean of its divisors is an integer number (305558617).

Almost surely, 2^2618844980 is an apocalyptic number.

2618844980 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

2618844980 is an abundant number, since it is smaller than the sum of its proper divisors (2881210126).

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

2618844980 is an frugal number, since it uses more digits than its factorization.

2618844980 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 22895 (or 11450 counting only the distinct ones).

The product of its (nonzero) digits is 884736, while the sum is 50.

The square root of 2618844980 is about 51174.6517330602. The cubic root of 2618844980 is about 1378.3830708471.

The spelling of 2618844980 in words is "two billion, six hundred eighteen million, eight hundred forty-four thousand, nine hundred eighty".