2555615620 has 12 divisors (see below), whose sum is σ = 5366792844. Its totient is φ = 1022246240.

The previous prime is 2555615617. The next prime is 2555615659. The reversal of 2555615620 is 265165552.

It can be written as a sum of positive squares in 2 ways, for example, as 805197376 + 1750418244 = 28376^2 + 41838^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 2555615620.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 63890371 + ... + 63890410.

It is an arithmetic number, because the mean of its divisors is an integer number (447232737).

Almost surely, 2^2555615620 is an apocalyptic number.

2555615620 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

2555615620 is an abundant number, since it is smaller than the sum of its proper divisors (2811177224).

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

2555615620 is a wasteful number, since it uses less digits than its factorization.

2555615620 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 127780790 (or 127780788 counting only the distinct ones).

The product of its (nonzero) digits is 90000, while the sum is 37.

The square root of 2555615620 is about 50553.0970366802. The cubic root of 2555615620 is about 1367.1993543797.

The spelling of 2555615620 in words is "two billion, five hundred fifty-five million, six hundred fifteen thousand, six hundred twenty".