2565097540 has 24 divisors (see below), whose sum is σ = 5620910400. Its totient is φ = 981428448.

The previous prime is 2565097537. The next prime is 2565097543. The reversal of 2565097540 is 457905652.

It is an interprime number because it is at equal distance from previous prime (2565097537) and next prime (2565097543).

It is not an unprimeable number, because it can be changed into a prime (2565097543) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2787690 + ... + 2788609.

It is an arithmetic number, because the mean of its divisors is an integer number (234204600).

Almost surely, 2^2565097540 is an apocalyptic number.

2565097540 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

2565097540 is an abundant number, since it is smaller than the sum of its proper divisors (3055812860).

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

2565097540 is a wasteful number, since it uses less digits than its factorization.

2565097540 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5576331 (or 5576329 counting only the distinct ones).

The product of its (nonzero) digits is 378000, while the sum is 43.

The square root of 2565097540 is about 50646.7920010735. The cubic root of 2565097540 is about 1368.8881418785. Note that the first 3 decimals are identical.

The spelling of 2565097540 in words is "two billion, five hundred sixty-five million, ninety-seven thousand, five hundred forty".