2560685920 has 48 divisors (see below), whose sum is σ = 6514981200. Its totient is φ = 945483264.

The previous prime is 2560685903. The next prime is 2560685923. The reversal of 2560685920 is 295860652.

It is a super-2 number, since 2×2560685920² = 13114224761772492800, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2560685923) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 613470 + ... + 617629.

It is an arithmetic number, because the mean of its divisors is an integer number (135728775).

Almost surely, 2^2560685920 is an apocalyptic number.

2560685920 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

2560685920 is an abundant number, since it is smaller than the sum of its proper divisors (3954295280).

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

2560685920 is a wasteful number, since it uses less digits than its factorization.

2560685920 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1231127 (or 1231119 counting only the distinct ones).

The product of its (nonzero) digits is 259200, while the sum is 43.

The square root of 2560685920 is about 50603.2204508764. The cubic root of 2560685920 is about 1368.1029242124.

The spelling of 2560685920 in words is "two billion, five hundred sixty million, six hundred eighty-five thousand, nine hundred twenty".