25641025949 has 8 divisors (see below), whose sum is σ = 31968032448. Its totient is φ = 19980020160.

The previous prime is 25641025913. The next prime is 25641026051. The reversal of 25641025949 is 94952014652.

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

It is a cyclic number.

It is not a de Polignac number, because 25641025949 - 2¹² = 25641021853 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (25641027949) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 166500092 + ... + 166500245.

It is an arithmetic number, because the mean of its divisors is an integer number (3996004056).

Almost surely, 2^25641025949 is an apocalyptic number.

It is an amenable number.

25641025949 is a deficient number, since it is larger than the sum of its proper divisors (6327006499).

25641025949 is a wasteful number, since it uses less digits than its factorization.

25641025949 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 333000355.

The product of its (nonzero) digits is 777600, while the sum is 47.

The spelling of 25641025949 in words is "twenty-five billion, six hundred forty-one million, twenty-five thousand, nine hundred forty-nine".