25136522633 has 2 divisors, whose sum is σ = 25136522634. Its totient is φ = 25136522632.

The previous prime is 25136522623. The next prime is 25136522641. The reversal of 25136522633 is 33622563152.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 21162102784 + 3974419849 = 145472^2 + 63043^2 .

It is a cyclic number.

It is not a de Polignac number, because 25136522633 - 2⁸ = 25136522377 is a prime.

It is not a weakly prime, because it can be changed into another prime (25136522623) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 12568261316 + 12568261317.

It is an arithmetic number, because the mean of its divisors is an integer number (12568261317).

Almost surely, 2^25136522633 is an apocalyptic number.

It is an amenable number.

25136522633 is a deficient number, since it is larger than the sum of its proper divisors (1).

25136522633 is an equidigital number, since it uses as much as digits as its factorization.

25136522633 is an evil number, because the sum of its binary digits is even.

The product of its digits is 194400, while the sum is 38.

The spelling of 25136522633 in words is "twenty-five billion, one hundred thirty-six million, five hundred twenty-two thousand, six hundred thirty-three".