25502245320 has 64 divisors (see below), whose sum is σ = 77950278720. Its totient is φ = 6672283904.

The previous prime is 25502245297. The next prime is 25502245361. The reversal of 25502245320 is 2354220552.

It is a super-2 number, since 2×25502245320² (a number of 22 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (30).

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1998534 + ... + 2011253.

It is an arithmetic number, because the mean of its divisors is an integer number (1217973105).

Almost surely, 2^25502245320 is an apocalyptic number.

25502245320 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

25502245320 is an abundant number, since it is smaller than the sum of its proper divisors (52448033400).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

25502245320 is a wasteful number, since it uses less digits than its factorization.

25502245320 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4009854 (or 4009850 counting only the distinct ones).

The product of its (nonzero) digits is 24000, while the sum is 30.

Adding to 25502245320 its reverse (2354220552), we get a palindrome (27856465872).

The spelling of 25502245320 in words is "twenty-five billion, five hundred two million, two hundred forty-five thousand, three hundred twenty".