25393449213 has 144 divisors (see below), whose sum is σ = 45446768640. Its totient is φ = 13998549600.

The previous prime is 25393449209. The next prime is 25393449223. The reversal of 25393449213 is 31294439352.

25393449213 is a `hidden beast` number, since 2 + 5 + 393 + 4 + 49 + 213 = 666.

It is not a de Polignac number, because 25393449213 - 2² = 25393449209 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (25393449203) 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 143 ways as a sum of consecutive naturals, for example, 199948356 + ... + 199948482.

It is an arithmetic number, because the mean of its divisors is an integer number (315602560).

Almost surely, 2^25393449213 is an apocalyptic number.

It is an amenable number.

25393449213 is a deficient number, since it is larger than the sum of its proper divisors (20053319427).

25393449213 is a wasteful number, since it uses less digits than its factorization.

25393449213 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 330 (or 191 counting only the distinct ones).

The product of its digits is 699840, while the sum is 45.

The spelling of 25393449213 in words is "twenty-five billion, three hundred ninety-three million, four hundred forty-nine thousand, two hundred thirteen".