25400613533 has 2 divisors, whose sum is σ = 25400613534. Its totient is φ = 25400613532.

The previous prime is 25400613521. The next prime is 25400613571. The reversal of 25400613533 is 33531600452.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 22643628484 + 2756985049 = 150478^2 + 52507^2 .

It is a cyclic number.

It is not a de Polignac number, because 25400613533 - 2²² = 25396419229 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 25400613533.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (25400613233) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 12700306766 + 12700306767.

It is an arithmetic number, because the mean of its divisors is an integer number (12700306767).

Almost surely, 2^25400613533 is an apocalyptic number.

It is an amenable number.

25400613533 is a deficient number, since it is larger than the sum of its proper divisors (1).

25400613533 is an equidigital number, since it uses as much as digits as its factorization.

25400613533 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 32400, while the sum is 32.

The spelling of 25400613533 in words is "twenty-five billion, four hundred million, six hundred thirteen thousand, five hundred thirty-three".