25079977449 has 48 divisors (see below), whose sum is σ = 37294193664. Its totient is φ = 16235704800.

The previous prime is 25079977421. The next prime is 25079977459. The reversal of 25079977449 is 94477997052.

25079977449 is a `hidden beast` number, since 2 + 50 + 79 + 9 + 77 + 449 = 666.

It is a de Polignac number, because none of the positive numbers 2^k-25079977449 is a prime.

It is not an unprimeable number, because it can be changed into a prime (25079977459) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 25828534 + ... + 25829504.

It is an arithmetic number, because the mean of its divisors is an integer number (776962368).

Almost surely, 2^25079977449 is an apocalyptic number.

It is an amenable number.

25079977449 is a deficient number, since it is larger than the sum of its proper divisors (12214216215).

25079977449 is a wasteful number, since it uses less digits than its factorization.

25079977449 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1618 (or 1615 counting only the distinct ones).

The product of its (nonzero) digits is 40007520, while the sum is 63.

The spelling of 25079977449 in words is "twenty-five billion, seventy-nine million, nine hundred seventy-seven thousand, four hundred forty-nine".