2511380561 has 4 divisors (see below), whose sum is σ = 2525410800. Its totient is φ = 2497350324.

The previous prime is 2511380549. The next prime is 2511380581. The reversal of 2511380561 is 1650831152.

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 2511380561 - 2¹⁸ = 2511118417 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (2511380581) 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, 7014851 + ... + 7015208.

It is an arithmetic number, because the mean of its divisors is an integer number (631352700).

Almost surely, 2^2511380561 is an apocalyptic number.

It is an amenable number.

2511380561 is a deficient number, since it is larger than the sum of its proper divisors (14030239).

2511380561 is a wasteful number, since it uses less digits than its factorization.

2511380561 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14030238.

The product of its (nonzero) digits is 7200, while the sum is 32.

The square root of 2511380561 is about 50113.6763867909. The cubic root of 2511380561 is about 1359.2651308506.

The spelling of 2511380561 in words is "two billion, five hundred eleven million, three hundred eighty thousand, five hundred sixty-one".