25277588957 has 2 divisors, whose sum is σ = 25277588958. Its totient is φ = 25277588956.

The previous prime is 25277588951. The next prime is 25277588977. The reversal of 25277588957 is 75988577252.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 24138593956 + 1138995001 = 155366^2 + 33749^2 .

It is a cyclic number.

It is not a de Polignac number, because 25277588957 - 2¹⁸ = 25277326813 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 25277588893 and 25277588902.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (25277588951) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 12638794478 + 12638794479.

It is an arithmetic number, because the mean of its divisors is an integer number (12638794479).

Almost surely, 2^25277588957 is an apocalyptic number.

It is an amenable number.

25277588957 is a deficient number, since it is larger than the sum of its proper divisors (1).

25277588957 is an equidigital number, since it uses as much as digits as its factorization.

25277588957 is an evil number, because the sum of its binary digits is even.

The product of its digits is 98784000, while the sum is 65.

The spelling of 25277588957 in words is "twenty-five billion, two hundred seventy-seven million, five hundred eighty-eight thousand, nine hundred fifty-seven".