2567541053561 has 4 divisors (see below), whose sum is σ = 2800953876624. Its totient is φ = 2334128230500.

The previous prime is 2567541053533. The next prime is 2567541053573. The reversal of 2567541053561 is 1653501457652.

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 de Polignac number, because none of the positive numbers 2^k-2567541053561 is a prime.

It is a super-2 number, since 2×2567541053561² (a number of 26 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2567541053531) 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, 116706411515 + ... + 116706411536.

It is an arithmetic number, because the mean of its divisors is an integer number (700238469156).

Almost surely, 2^{2567541053561} is an apocalyptic number.

It is an amenable number.

2567541053561 is a deficient number, since it is larger than the sum of its proper divisors (233412823063).

2567541053561 is a wasteful number, since it uses less digits than its factorization.

2567541053561 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 233412823062.

The product of its (nonzero) digits is 3780000, while the sum is 50.

The spelling of 2567541053561 in words is "two trillion, five hundred sixty-seven billion, five hundred forty-one million, fifty-three thousand, five hundred sixty-one".