25539908753 has 2 divisors, whose sum is σ = 25539908754. Its totient is φ = 25539908752.

The previous prime is 25539908749. The next prime is 25539908803. The reversal of 25539908753 is 35780993552.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 13463657089 + 12076251664 = 116033^2 + 109892^2 .

It is a cyclic number.

It is not a de Polignac number, because 25539908753 - 2² = 25539908749 is a prime.

It is a super-2 number, since 2×25539908753² (a number of 22 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (25539908743) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 12769954376 + 12769954377.

It is an arithmetic number, because the mean of its divisors is an integer number (12769954377).

Almost surely, 2^25539908753 is an apocalyptic number.

It is an amenable number.

25539908753 is a deficient number, since it is larger than the sum of its proper divisors (1).

25539908753 is an equidigital number, since it uses as much as digits as its factorization.

25539908753 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 10206000, while the sum is 56.

The spelling of 25539908753 in words is "twenty-five billion, five hundred thirty-nine million, nine hundred eight thousand, seven hundred fifty-three".