25726998011987 has 16 divisors (see below), whose sum is σ = 26759756620800. Its totient is φ = 24707075893920.

The previous prime is 25726998011963. The next prime is 25726998012083. The reversal of 25726998011987 is 78911089962752.

It is a cyclic number.

It is not a de Polignac number, because 25726998011987 - 2²⁴ = 25726981234771 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (25726998011947) 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, 8461448 + ... + 11092794.

It is an arithmetic number, because the mean of its divisors is an integer number (1672484788800).

Almost surely, 2^{25726998011987} is an apocalyptic number.

25726998011987 is a deficient number, since it is larger than the sum of its proper divisors (1032758608813).

25726998011987 is a wasteful number, since it uses less digits than its factorization.

25726998011987 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2633786.

The product of its (nonzero) digits is 274337280, while the sum is 74.

The spelling of 25726998011987 in words is "twenty-five trillion, seven hundred twenty-six billion, nine hundred ninety-eight million, eleven thousand, nine hundred eighty-seven".