2649556020 has 24 divisors (see below), whose sum is σ = 7418757024. Its totient is φ = 706548256.

The previous prime is 2649556009. The next prime is 2649556033. The reversal of 2649556020 is 206559462.

It is a self number, because there is not a number n which added to its sum of digits gives 2649556020.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 22079574 + ... + 22079693.

It is an arithmetic number, because the mean of its divisors is an integer number (309114876).

Almost surely, 2^2649556020 is an apocalyptic number.

2649556020 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

2649556020 is an abundant number, since it is smaller than the sum of its proper divisors (4769201004).

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

2649556020 is a wasteful number, since it uses less digits than its factorization.

2649556020 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 44159279 (or 44159277 counting only the distinct ones).

The product of its (nonzero) digits is 129600, while the sum is 39.

The square root of 2649556020 is about 51473.8382093273. The cubic root of 2649556020 is about 1383.7502173489.

The spelling of 2649556020 in words is "two billion, six hundred forty-nine million, five hundred fifty-six thousand, twenty".