25723330117 has 2 divisors, whose sum is σ = 25723330118. Its totient is φ = 25723330116.

The previous prime is 25723330093. The next prime is 25723330123. The reversal of 25723330117 is 71103332752.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 25493231556 + 230098561 = 159666^2 + 15169^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-25723330117 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (25723330147) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 12861665058 + 12861665059.

It is an arithmetic number, because the mean of its divisors is an integer number (12861665059).

Almost surely, 2^25723330117 is an apocalyptic number.

It is an amenable number.

25723330117 is a deficient number, since it is larger than the sum of its proper divisors (1).

25723330117 is an equidigital number, since it uses as much as digits as its factorization.

25723330117 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 26460, while the sum is 34.

Adding to 25723330117 its reverse (71103332752), we get a palindrome (96826662869).

The spelling of 25723330117 in words is "twenty-five billion, seven hundred twenty-three million, three hundred thirty thousand, one hundred seventeen".