2565610346640 has 160 divisors (see below), whose sum is σ = 8762333853312. Its totient is φ = 615808000000.

The previous prime is 2565610346581. The next prime is 2565610346641. The reversal of 2565610346640 is 466430165652.

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 2565610346640.

It is not an unprimeable number, because it can be changed into a prime (2565610346641) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 4544361 + ... + 5077640.

Almost surely, 2^{2565610346640} is an apocalyptic number.

2565610346640 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

2565610346640 is an abundant number, since it is smaller than the sum of its proper divisors (6196723506672).

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

2565610346640 is a wasteful number, since it uses less digits than its factorization.

2565610346640 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9622129 (or 9622123 counting only the distinct ones).

The product of its (nonzero) digits is 3110400, while the sum is 48.

The spelling of 2565610346640 in words is "two trillion, five hundred sixty-five billion, six hundred ten million, three hundred forty-six thousand, six hundred forty".