25366094557 has 2 divisors, whose sum is σ = 25366094558. Its totient is φ = 25366094556.

The previous prime is 25366094491. The next prime is 25366094563. The reversal of 25366094557 is 75549066352.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 25321083876 + 45010681 = 159126^2 + 6709^2 .

It is a cyclic number.

It is not a de Polignac number, because 25366094557 - 2¹⁵ = 25366061789 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (25366094597) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 12683047278 + 12683047279.

It is an arithmetic number, because the mean of its divisors is an integer number (12683047279).

Almost surely, 2^25366094557 is an apocalyptic number.

It is an amenable number.

25366094557 is a deficient number, since it is larger than the sum of its proper divisors (1).

25366094557 is an equidigital number, since it uses as much as digits as its factorization.

25366094557 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 6804000, while the sum is 52.

The spelling of 25366094557 in words is "twenty-five billion, three hundred sixty-six million, ninety-four thousand, five hundred fifty-seven".