21641120733625 has 16 divisors (see below), whose sum is σ = 27388514724480. Its totient is φ = 17069052966000.

The previous prime is 21641120733613. The next prime is 21641120733649. The reversal of 21641120733625 is 52633702114612.

It is not a de Polignac number, because 21641120733625 - 2⁷ = 21641120733497 is a prime.

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, 1219209195 + ... + 1219226944.

It is an arithmetic number, because the mean of its divisors is an integer number (1711782170280).

Almost surely, 2^{21641120733625} is an apocalyptic number.

21641120733625 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

It is an amenable number.

21641120733625 is a deficient number, since it is larger than the sum of its proper divisors (5747393990855).

21641120733625 is an equidigital number, since it uses as much as digits as its factorization.

21641120733625 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2438436225 (or 2438436215 counting only the distinct ones).

The product of its (nonzero) digits is 362880, while the sum is 43.

The spelling of 21641120733625 in words is "twenty-one trillion, six hundred forty-one billion, one hundred twenty million, seven hundred thirty-three thousand, six hundred twenty-five".