25716137817 has 16 divisors (see below), whose sum is σ = 35618976000. Its totient is φ = 16483643904.

The previous prime is 25716137807. The next prime is 25716137857. The reversal of 25716137817 is 71873161752.

It is not a de Polignac number, because 25716137817 - 2¹⁶ = 25716072281 is a prime.

It is a super-2 number, since 2×25716137817² (a number of 22 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (25716137807) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 597592 + ... + 639177.

It is an arithmetic number, because the mean of its divisors is an integer number (2226186000).

Almost surely, 2^25716137817 is an apocalyptic number.

It is an amenable number.

25716137817 is a deficient number, since it is larger than the sum of its proper divisors (9902838183).

25716137817 is a wasteful number, since it uses less digits than its factorization.

25716137817 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1237040.

The product of its digits is 493920, while the sum is 48.

The spelling of 25716137817 in words is "twenty-five billion, seven hundred sixteen million, one hundred thirty-seven thousand, eight hundred seventeen".