25693338577 has 2 divisors, whose sum is σ = 25693338578. Its totient is φ = 25693338576.

The previous prime is 25693338557. The next prime is 25693338623. The reversal of 25693338577 is 77583339652.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 19872258961 + 5821079616 = 140969^2 + 76296^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-25693338577 is a prime.

It is not a weakly prime, because it can be changed into another prime (25693338557) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 12846669288 + 12846669289.

It is an arithmetic number, because the mean of its divisors is an integer number (12846669289).

Almost surely, 2^25693338577 is an apocalyptic number.

It is an amenable number.

25693338577 is a deficient number, since it is larger than the sum of its proper divisors (1).

25693338577 is an equidigital number, since it uses as much as digits as its factorization.

25693338577 is an evil number, because the sum of its binary digits is even.

The product of its digits is 28576800, while the sum is 58.

The spelling of 25693338577 in words is "twenty-five billion, six hundred ninety-three million, three hundred thirty-eight thousand, five hundred seventy-seven".