2565841920 has 88 divisors (see below), whose sum is σ = 8206734144. Its totient is φ = 684220416.

The previous prime is 2565841919. The next prime is 2565841979. The reversal of 2565841920 is 291485652.

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 7 ways as a sum of consecutive naturals, for example, 68164 + ... + 98883.

Almost surely, 2^2565841920 is an apocalyptic number.

2565841920 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

2565841920 is an abundant number, since it is smaller than the sum of its proper divisors (5640892224).

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

2565841920 is a wasteful number, since it uses less digits than its factorization.

2565841920 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 167075 (or 167057 counting only the distinct ones).

The product of its (nonzero) digits is 172800, while the sum is 42.

The square root of 2565841920 is about 50654.1402059101. The cubic root of 2565841920 is about 1369.0205441736.

The spelling of 2565841920 in words is "two billion, five hundred sixty-five million, eight hundred forty-one thousand, nine hundred twenty".