21716577435644 has 24 divisors (see below), whose sum is σ = 46774166785248. Its totient is φ = 8591173490880.

The previous prime is 21716577435593. The next prime is 21716577435673. The reversal of 21716577435644 is 44653477561712.

It is a Smith number, since the sum of its digits (62) coincides with the sum of the digits of its prime factors.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 29830463147 + ... + 29830463874.

It is an arithmetic number, because the mean of its divisors is an integer number (1948923616052).

Almost surely, 2^{21716577435644} is an apocalyptic number.

It is an amenable number.

21716577435644 is an abundant number, since it is smaller than the sum of its proper divisors (25057589349604).

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

21716577435644 is a wasteful number, since it uses less digits than its factorization.

21716577435644 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 59660927045 (or 59660927043 counting only the distinct ones).

The product of its digits is 118540800, while the sum is 62.

The spelling of 21716577435644 in words is "twenty-one trillion, seven hundred sixteen billion, five hundred seventy-seven million, four hundred thirty-five thousand, six hundred forty-four".