2560949450581 has 4 divisors (see below), whose sum is σ = 2620506414592. Its totient is φ = 2501392486572.

The previous prime is 2560949450539. The next prime is 2560949450611. The reversal of 2560949450581 is 1850549490652.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 2560949450581 - 2²¹ = 2560947353429 is a prime.

It is a super-2 number, since 2×2560949450581² (a number of 26 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2560949450981) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 29778481941 + ... + 29778482026.

It is an arithmetic number, because the mean of its divisors is an integer number (655126603648).

Almost surely, 2^{2560949450581} is an apocalyptic number.

It is an amenable number.

2560949450581 is a deficient number, since it is larger than the sum of its proper divisors (59556964011).

2560949450581 is an equidigital number, since it uses as much as digits as its factorization.

2560949450581 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 59556964010.

The product of its (nonzero) digits is 15552000, while the sum is 58.

The spelling of 2560949450581 in words is "two trillion, five hundred sixty billion, nine hundred forty-nine million, four hundred fifty thousand, five hundred eighty-one".