25162479761 has 2 divisors, whose sum is σ = 25162479762. Its totient is φ = 25162479760.

The previous prime is 25162479737. The next prime is 25162479829. The reversal of 25162479761 is 16797426152.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 22046607361 + 3115872400 = 148481^2 + 55820^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-25162479761 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is not a weakly prime, because it can be changed into another prime (25162479731) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 12581239880 + 12581239881.

It is an arithmetic number, because the mean of its divisors is an integer number (12581239881).

Almost surely, 2^25162479761 is an apocalyptic number.

It is an amenable number.

25162479761 is a deficient number, since it is larger than the sum of its proper divisors (1).

25162479761 is an equidigital number, since it uses as much as digits as its factorization.

25162479761 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1270080, while the sum is 50.

The spelling of 25162479761 in words is "twenty-five billion, one hundred sixty-two million, four hundred seventy-nine thousand, seven hundred sixty-one".