2545700561 has 4 divisors (see below), whose sum is σ = 2546029632. Its totient is φ = 2545371492.

The previous prime is 2545700551. The next prime is 2545700569. The reversal of 2545700561 is 1650075452.

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 2545700561 - 2²⁶ = 2478591697 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2545700569) 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, 152645 + ... + 168498.

It is an arithmetic number, because the mean of its divisors is an integer number (636507408).

Almost surely, 2^2545700561 is an apocalyptic number.

It is an amenable number.

2545700561 is a deficient number, since it is larger than the sum of its proper divisors (329071).

2545700561 is an equidigital number, since it uses as much as digits as its factorization.

2545700561 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 329070.

The product of its (nonzero) digits is 42000, while the sum is 35.

The square root of 2545700561 is about 50454.9359428788. The cubic root of 2545700561 is about 1365.4289484548.

The spelling of 2545700561 in words is "two billion, five hundred forty-five million, seven hundred thousand, five hundred sixty-one".