25220648049 has 8 divisors (see below), whose sum is σ = 34197489120. Its totient is φ = 16528786176.

The previous prime is 25220648003. The next prime is 25220648077. The reversal of 25220648049 is 94084602252.

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

It is not a de Polignac number, because 25220648049 - 2¹² = 25220643953 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 25220648049.

It is not an unprimeable number, because it can be changed into a prime (25220648249) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 71244592 + ... + 71244945.

It is an arithmetic number, because the mean of its divisors is an integer number (4274686140).

Almost surely, 2^25220648049 is an apocalyptic number.

It is an amenable number.

25220648049 is a deficient number, since it is larger than the sum of its proper divisors (8976841071).

25220648049 is a wasteful number, since it uses less digits than its factorization.

25220648049 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 142489599.

The product of its (nonzero) digits is 276480, while the sum is 42.

The spelling of 25220648049 in words is "twenty-five billion, two hundred twenty million, six hundred forty-eight thousand, forty-nine".