25594449551 has 16 divisors (see below), whose sum is σ = 28657039488. Its totient is φ = 22657773600.

The previous prime is 25594449539. The next prime is 25594449563. The reversal of 25594449551 is 15594449552.

It is an interprime number because it is at equal distance from previous prime (25594449539) and next prime (25594449563).

It is not a de Polignac number, because 25594449551 - 2¹⁴ = 25594433167 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 25594449493 and 25594449502.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (25594449571) 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, 74825 + ... + 238301.

It is an arithmetic number, because the mean of its divisors is an integer number (1791064968).

Almost surely, 2^25594449551 is an apocalyptic number.

25594449551 is a deficient number, since it is larger than the sum of its proper divisors (3062589937).

25594449551 is a wasteful number, since it uses less digits than its factorization.

25594449551 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 163862.

The product of its digits is 6480000, while the sum is 53.

Subtracting from 25594449551 its reverse (15594449552), we obtain a palindrome (9999999999).

The spelling of 25594449551 in words is "twenty-five billion, five hundred ninety-four million, four hundred forty-nine thousand, five hundred fifty-one".