21163132464425 has 48 divisors (see below), whose sum is σ = 31572174489600. Its totient is φ = 13746987316800.

The previous prime is 21163132464377. The next prime is 21163132464433. The reversal of 21163132464425 is 52446423136112.

It is not a de Polignac number, because 21163132464425 - 2¹² = 21163132460329 is a prime.

It is a Curzon number.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 42682586 + ... + 43175564.

It is an arithmetic number, because the mean of its divisors is an integer number (657753635200).

Almost surely, 2^{21163132464425} is an apocalyptic number.

21163132464425 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

It is an amenable number.

21163132464425 is a deficient number, since it is larger than the sum of its proper divisors (10409042025175).

21163132464425 is a wasteful number, since it uses less digits than its factorization.

21163132464425 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 505926 (or 505921 counting only the distinct ones).

The product of its digits is 829440, while the sum is 44.

The spelling of 21163132464425 in words is "twenty-one trillion, one hundred sixty-three billion, one hundred thirty-two million, four hundred sixty-four thousand, four hundred twenty-five".