25537622069 has 2 divisors, whose sum is σ = 25537622070. Its totient is φ = 25537622068.

The previous prime is 25537622059. The next prime is 25537622083. The reversal of 25537622069 is 96022673552.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 15263367025 + 10274255044 = 123545^2 + 101362^2 .

It is a cyclic number.

It is not a de Polignac number, because 25537622069 - 2²⁰ = 25536573493 is a prime.

It is a super-2 number, since 2×25537622069² (a number of 22 digits) contains 22 as substring.

It is a Sophie Germain prime.

It is a Curzon number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (25537622059) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 12768811034 + 12768811035.

It is an arithmetic number, because the mean of its divisors is an integer number (12768811035).

Almost surely, 2^25537622069 is an apocalyptic number.

It is an amenable number.

25537622069 is a deficient number, since it is larger than the sum of its proper divisors (1).

25537622069 is an equidigital number, since it uses as much as digits as its factorization.

25537622069 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1360800, while the sum is 47.

The spelling of 25537622069 in words is "twenty-five billion, five hundred thirty-seven million, six hundred twenty-two thousand, sixty-nine".