25056717586989 has 32 divisors (see below), whose sum is σ = 37222207617024. Its totient is φ = 14862536542080.

The previous prime is 25056717586961. The next prime is 25056717586993. The reversal of 25056717586989 is 98968571765052.

It is not a de Polignac number, because 25056717586989 - 2⁴⁰ = 23957205959213 is a prime.

It is a super-2 number, since 2×25056717586989² (a number of 28 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (25056717586909) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 137952897 + ... + 138134409.

It is an arithmetic number, because the mean of its divisors is an integer number (1163193988032).

Almost surely, 2^{25056717586989} is an apocalyptic number.

It is an amenable number.

25056717586989 is a deficient number, since it is larger than the sum of its proper divisors (12165490030035).

25056717586989 is a wasteful number, since it uses less digits than its factorization.

25056717586989 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 270577.

The product of its (nonzero) digits is 2286144000, while the sum is 78.

The spelling of 25056717586989 in words is "twenty-five trillion, fifty-six billion, seven hundred seventeen million, five hundred eighty-six thousand, nine hundred eighty-nine".