25579238589949 has 16 divisors (see below), whose sum is σ = 28413362267136. Its totient is φ = 22832165703600.

The previous prime is 25579238589881. The next prime is 25579238589967. The reversal of 25579238589949 is 94998583297552.

It is a de Polignac number, because none of the positive numbers 2^k-25579238589949 is a prime.

It is a super-2 number, since 2×25579238589949² (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 (25579238589649) 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, 56300197 + ... + 56752714.

It is an arithmetic number, because the mean of its divisors is an integer number (1775835141696).

Almost surely, 2^{25579238589949} is an apocalyptic number.

It is an amenable number.

25579238589949 is a deficient number, since it is larger than the sum of its proper divisors (2834123677187).

25579238589949 is a wasteful number, since it uses less digits than its factorization.

25579238589949 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 113053296.

The product of its digits is 17635968000, while the sum is 85.

The spelling of 25579238589949 in words is "twenty-five trillion, five hundred seventy-nine billion, two hundred thirty-eight million, five hundred eighty-nine thousand, nine hundred forty-nine".