25677273397 has 2 divisors, whose sum is σ = 25677273398. Its totient is φ = 25677273396.

The previous prime is 25677273367. The next prime is 25677273443. The reversal of 25677273397 is 79337277652.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 25245714321 + 431559076 = 158889^2 + 20774^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-25677273397 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (25677273317) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 12838636698 + 12838636699.

It is an arithmetic number, because the mean of its divisors is an integer number (12838636699).

Almost surely, 2^25677273397 is an apocalyptic number.

It is an amenable number.

25677273397 is a deficient number, since it is larger than the sum of its proper divisors (1).

25677273397 is an equidigital number, since it uses as much as digits as its factorization.

25677273397 is an evil number, because the sum of its binary digits is even.

The product of its digits is 23337720, while the sum is 58.

The spelling of 25677273397 in words is "twenty-five billion, six hundred seventy-seven million, two hundred seventy-three thousand, three hundred ninety-seven".