25221636563140 has 24 divisors (see below), whose sum is σ = 52997990899392. Its totient is φ = 10082453841120.

The previous prime is 25221636563099. The next prime is 25221636563177. The reversal of 25221636563140 is 4136563612252.

It is a super-2 number, since 2×25221636563140² (a number of 28 digits) contains 22 as substring.

It is an unprimeable number.

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 7 ways as a sum of consecutive naturals, for example, 387515656 + ... + 387580735.

It is an arithmetic number, because the mean of its divisors is an integer number (2208249620808).

Almost surely, 2^{25221636563140} is an apocalyptic number.

25221636563140 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

25221636563140 is an abundant number, since it is smaller than the sum of its proper divisors (27776354336252).

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

25221636563140 is a wasteful number, since it uses less digits than its factorization.

25221636563140 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 775098027 (or 775098025 counting only the distinct ones).

The product of its (nonzero) digits is 1555200, while the sum is 46.

The spelling of 25221636563140 in words is "twenty-five trillion, two hundred twenty-one billion, six hundred thirty-six million, five hundred sixty-three thousand, one hundred forty".