25511639953 has 2 divisors, whose sum is σ = 25511639954. Its totient is φ = 25511639952.

The previous prime is 25511639927. The next prime is 25511640001. The reversal of 25511639953 is 35993611552.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 23492305984 + 2019333969 = 153272^2 + 44937^2 .

It is a cyclic number.

It is not a de Polignac number, because 25511639953 - 2²¹ = 25509542801 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 25511639897 and 25511639906.

It is not a weakly prime, because it can be changed into another prime (25511639753) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 12755819976 + 12755819977.

It is an arithmetic number, because the mean of its divisors is an integer number (12755819977).

Almost surely, 2^25511639953 is an apocalyptic number.

It is an amenable number.

25511639953 is a deficient number, since it is larger than the sum of its proper divisors (1).

25511639953 is an equidigital number, since it uses as much as digits as its factorization.

25511639953 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1093500, while the sum is 49.

The spelling of 25511639953 in words is "twenty-five billion, five hundred eleven million, six hundred thirty-nine thousand, nine hundred fifty-three".