25142253497 has 2 divisors, whose sum is σ = 25142253498. Its totient is φ = 25142253496.

The previous prime is 25142253449. The next prime is 25142253517. The reversal of 25142253497 is 79435224152.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 24942200761 + 200052736 = 157931^2 + 14144^2 .

It is a cyclic number.

It is not a de Polignac number, because 25142253497 - 2¹² = 25142249401 is a prime.

It is not a weakly prime, because it can be changed into another prime (25142253197) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 12571126748 + 12571126749.

It is an arithmetic number, because the mean of its divisors is an integer number (12571126749).

Almost surely, 2^25142253497 is an apocalyptic number.

It is an amenable number.

25142253497 is a deficient number, since it is larger than the sum of its proper divisors (1).

25142253497 is an equidigital number, since it uses as much as digits as its factorization.

25142253497 is an evil number, because the sum of its binary digits is even.

The product of its digits is 604800, while the sum is 44.

The spelling of 25142253497 in words is "twenty-five billion, one hundred forty-two million, two hundred fifty-three thousand, four hundred ninety-seven".