25676638364077 has 2 divisors, whose sum is σ = 25676638364078. Its totient is φ = 25676638364076.

The previous prime is 25676638363997. The next prime is 25676638364093. The reversal of 25676638364077 is 77046383667652.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 24519075402276 + 1157562961801 = 4951674^2 + 1075901^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-25676638364077 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 25676638363997 and 25676638364015.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (25676638364777) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 12838319182038 + 12838319182039.

It is an arithmetic number, because the mean of its divisors is an integer number (12838319182039).

Almost surely, 2^{25676638364077} is an apocalyptic number.

It is an amenable number.

25676638364077 is a deficient number, since it is larger than the sum of its proper divisors (1).

25676638364077 is an equidigital number, since it uses as much as digits as its factorization.

25676638364077 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1280240640, while the sum is 70.

The spelling of 25676638364077 in words is "twenty-five trillion, six hundred seventy-six billion, six hundred thirty-eight million, three hundred sixty-four thousand, seventy-seven".