25023633641 has 2 divisors, whose sum is σ = 25023633642. Its totient is φ = 25023633640.

The previous prime is 25023633619. The next prime is 25023633737. The reversal of 25023633641 is 14633632052.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 12858426025 + 12165207616 = 113395^2 + 110296^2 .

It is a cyclic number.

It is not a de Polignac number, because 25023633641 - 2¹⁰ = 25023632617 is a prime.

It is not a weakly prime, because it can be changed into another prime (25023633601) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 12511816820 + 12511816821.

It is an arithmetic number, because the mean of its divisors is an integer number (12511816821).

Almost surely, 2^25023633641 is an apocalyptic number.

It is an amenable number.

25023633641 is a deficient number, since it is larger than the sum of its proper divisors (1).

25023633641 is an equidigital number, since it uses as much as digits as its factorization.

25023633641 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 77760, while the sum is 35.

The spelling of 25023633641 in words is "twenty-five billion, twenty-three million, six hundred thirty-three thousand, six hundred forty-one".