2581025413565 has 16 divisors (see below), whose sum is σ = 3128006889216. Its totient is φ = 2044304184000.

The previous prime is 2581025413537. The next prime is 2581025413573. The reversal of 2581025413565 is 5653145201852.

It is not a de Polignac number, because 2581025413565 - 2⁶ = 2581025413501 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 17613650 + ... + 17759580.

It is an arithmetic number, because the mean of its divisors is an integer number (195500430576).

Almost surely, 2^{2581025413565} is an apocalyptic number.

It is an amenable number.

2581025413565 is a deficient number, since it is larger than the sum of its proper divisors (546981475651).

2581025413565 is a wasteful number, since it uses less digits than its factorization.

2581025413565 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 181060.

The product of its (nonzero) digits is 1440000, while the sum is 47.

The spelling of 2581025413565 in words is "two trillion, five hundred eighty-one billion, twenty-five million, four hundred thirteen thousand, five hundred sixty-five".