21616245235604 has 24 divisors (see below), whose sum is σ = 37882367577600. Its totient is φ = 10792714356000.

The previous prime is 21616245235589. The next prime is 21616245235633. The reversal of 21616245235604 is 40653254261612.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 32076677 + ... + 32743635.

It is an arithmetic number, because the mean of its divisors is an integer number (1578431982400).

Almost surely, 2^{21616245235604} is an apocalyptic number.

It is an amenable number.

21616245235604 is a deficient number, since it is larger than the sum of its proper divisors (16266122341996).

21616245235604 is a wasteful number, since it uses less digits than its factorization.

21616245235604 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 678503 (or 678501 counting only the distinct ones).

The product of its (nonzero) digits is 2073600, while the sum is 47.

The spelling of 21616245235604 in words is "twenty-one trillion, six hundred sixteen billion, two hundred forty-five million, two hundred thirty-five thousand, six hundred four".