25201077497 has 2 divisors, whose sum is σ = 25201077498. Its totient is φ = 25201077496.

The previous prime is 25201077409. The next prime is 25201077509. The reversal of 25201077497 is 79477010252.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 24220385641 + 980691856 = 155629^2 + 31316^2 .

It is a cyclic number.

It is not a de Polignac number, because 25201077497 - 2⁸ = 25201077241 is a prime.

It is not a weakly prime, because it can be changed into another prime (25201077197) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 12600538748 + 12600538749.

It is an arithmetic number, because the mean of its divisors is an integer number (12600538749).

Almost surely, 2^25201077497 is an apocalyptic number.

It is an amenable number.

25201077497 is a deficient number, since it is larger than the sum of its proper divisors (1).

25201077497 is an equidigital number, since it uses as much as digits as its factorization.

25201077497 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 246960, while the sum is 44.

The spelling of 25201077497 in words is "twenty-five billion, two hundred one million, seventy-seven thousand, four hundred ninety-seven".