25077668417 has 2 divisors, whose sum is σ = 25077668418. Its totient is φ = 25077668416.

The previous prime is 25077668383. The next prime is 25077668443. The reversal of 25077668417 is 71486677052.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 12608819521 + 12468848896 = 112289^2 + 111664^2 .

It is a cyclic number.

It is not a de Polignac number, because 25077668417 - 2³⁴ = 7897799233 is a prime.

It is not a weakly prime, because it can be changed into another prime (25077668617) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 12538834208 + 12538834209.

It is an arithmetic number, because the mean of its divisors is an integer number (12538834209).

Almost surely, 2^25077668417 is an apocalyptic number.

It is an amenable number.

25077668417 is a deficient number, since it is larger than the sum of its proper divisors (1).

25077668417 is an equidigital number, since it uses as much as digits as its factorization.

25077668417 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 3951360, while the sum is 53.

The spelling of 25077668417 in words is "twenty-five billion, seventy-seven million, six hundred sixty-eight thousand, four hundred seventeen".