25726261250557 has 8 divisors (see below), whose sum is σ = 29401685358336. Its totient is φ = 22050898125072.

The previous prime is 25726261250519. The next prime is 25726261250561. The reversal of 25726261250557 is 75505216262752.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-25726261250557 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 25726261250498 and 25726261250507.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (25726261250587) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 14337973 + ... + 16032154.

It is an arithmetic number, because the mean of its divisors is an integer number (3675210669792).

Almost surely, 2^{25726261250557} is an apocalyptic number.

It is an amenable number.

25726261250557 is a deficient number, since it is larger than the sum of its proper divisors (3675424107779).

25726261250557 is a wasteful number, since it uses less digits than its factorization.

25726261250557 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 30491147.

The product of its (nonzero) digits is 17640000, while the sum is 55.

The spelling of 25726261250557 in words is "twenty-five trillion, seven hundred twenty-six billion, two hundred sixty-one million, two hundred fifty thousand, five hundred fifty-seven".