25520202399 has 8 divisors (see below), whose sum is σ = 34077499312. Its totient is φ = 16988186880.

The previous prime is 25520202347. The next prime is 25520202427. The reversal of 25520202399 is 99320202552.

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

It is not a de Polignac number, because 25520202399 - 2⁸ = 25520202143 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (25520202899) 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, 6317992 + ... + 6322029.

It is an arithmetic number, because the mean of its divisors is an integer number (4259687414).

Almost surely, 2^25520202399 is an apocalyptic number.

25520202399 is a deficient number, since it is larger than the sum of its proper divisors (8557296913).

25520202399 is a wasteful number, since it uses less digits than its factorization.

25520202399 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12640697.

The product of its (nonzero) digits is 97200, while the sum is 39.

The spelling of 25520202399 in words is "twenty-five billion, five hundred twenty million, two hundred two thousand, three hundred ninety-nine".