25074561601 has 4 divisors (see below), whose sum is σ = 25074878400. Its totient is φ = 25074244804.

The previous prime is 25074561599. The next prime is 25074561619. The reversal of 25074561601 is 10616547052.

It is a happy number.

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, and also a brilliant number, because the two primes have the same length.

It is a cyclic number.

It is not a de Polignac number, because 25074561601 - 2¹ = 25074561599 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (25074561641) 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, 73260 + ... + 235618.

It is an arithmetic number, because the mean of its divisors is an integer number (6268719600).

Almost surely, 2^25074561601 is an apocalyptic number.

It is an amenable number.

25074561601 is a deficient number, since it is larger than the sum of its proper divisors (316799).

25074561601 is a wasteful number, since it uses less digits than its factorization.

25074561601 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 316798.

The product of its (nonzero) digits is 50400, while the sum is 37.

The spelling of 25074561601 in words is "twenty-five billion, seventy-four million, five hundred sixty-one thousand, six hundred one".