2565471325440 has 72 divisors (see below), whose sum is σ = 8193474057888. Its totient is φ = 684125685760.

The previous prime is 2565471325433. The next prime is 2565471325441. The reversal of 2565471325440 is 445231745652.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (48).

It is a self number, because there is not a number n which added to its sum of digits gives 2565471325440.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2565471325441) 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, 334041906 + ... + 334049585.

It is an arithmetic number, because the mean of its divisors is an integer number (113798250804).

Almost surely, 2^{2565471325440} is an apocalyptic number.

2565471325440 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

2565471325440 is an abundant number, since it is smaller than the sum of its proper divisors (5628002732448).

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

2565471325440 is an equidigital number, since it uses as much as digits as its factorization.

2565471325440 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 668091515 (or 668091501 counting only the distinct ones).

The product of its (nonzero) digits is 4032000, while the sum is 48.

The spelling of 2565471325440 in words is "two trillion, five hundred sixty-five billion, four hundred seventy-one million, three hundred twenty-five thousand, four hundred forty".