2501669561 has 32 divisors (see below), whose sum is σ = 2852236800. Its totient is φ = 2179872000.

The previous prime is 2501669449. The next prime is 2501669581. The reversal of 2501669561 is 1659661052.

2501669561 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a cyclic number.

It is not a de Polignac number, because 2501669561 - 2²² = 2497475257 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2501669581) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 4783046 + ... + 4783568.

It is an arithmetic number, because the mean of its divisors is an integer number (89132400).

Almost surely, 2^2501669561 is an apocalyptic number.

It is an amenable number.

2501669561 is a deficient number, since it is larger than the sum of its proper divisors (350567239).

2501669561 is a wasteful number, since it uses less digits than its factorization.

2501669561 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 869.

The product of its (nonzero) digits is 97200, while the sum is 41.

The square root of 2501669561 is about 50016.6928234964. The cubic root of 2501669561 is about 1357.5108667861.

The spelling of 2501669561 in words is "two billion, five hundred one million, six hundred sixty-nine thousand, five hundred sixty-one".