25710891417 has 6 divisors (see below), whose sum is σ = 37137954282. Its totient is φ = 17140594272.

The previous prime is 25710891413. The next prime is 25710891449. The reversal of 25710891417 is 71419801752.

It is a happy number.

It can be written as a sum of positive squares in only one way, i.e., 22259446416 + 3451445001 = 149196^2 + 58749^2 .

It is not a de Polignac number, because 25710891417 - 2² = 25710891413 is a prime.

It is a super-2 number, since 2×25710891417² (a number of 22 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (25710891413) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 1428382848 + ... + 1428382865.

It is an arithmetic number, because the mean of its divisors is an integer number (6189659047).

Almost surely, 2^25710891417 is an apocalyptic number.

It is an amenable number.

25710891417 is a deficient number, since it is larger than the sum of its proper divisors (11427062865).

25710891417 is a wasteful number, since it uses less digits than its factorization.

25710891417 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2856765719 (or 2856765716 counting only the distinct ones).

The product of its (nonzero) digits is 141120, while the sum is 45.

The spelling of 25710891417 in words is "twenty-five billion, seven hundred ten million, eight hundred ninety-one thousand, four hundred seventeen".