25139774273 has 2 divisors, whose sum is σ = 25139774274. Its totient is φ = 25139774272.

The previous prime is 25139774201. The next prime is 25139774311. The reversal of 25139774273 is 37247793152.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 24483799729 + 655974544 = 156473^2 + 25612^2 .

It is a cyclic number.

It is not a de Polignac number, because 25139774273 - 2⁸ = 25139774017 is a prime.

It is not a weakly prime, because it can be changed into another prime (25139773273) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 12569887136 + 12569887137.

It is an arithmetic number, because the mean of its divisors is an integer number (12569887137).

Almost surely, 2^25139774273 is an apocalyptic number.

It is an amenable number.

25139774273 is a deficient number, since it is larger than the sum of its proper divisors (1).

25139774273 is an equidigital number, since it uses as much as digits as its factorization.

25139774273 is an evil number, because the sum of its binary digits is even.

The product of its digits is 2222640, while the sum is 50.

The spelling of 25139774273 in words is "twenty-five billion, one hundred thirty-nine million, seven hundred seventy-four thousand, two hundred seventy-three".