21616593246 has 48 divisors (see below), whose sum is σ = 49367235840. Its totient is φ = 6817122000.

The previous prime is 21616593223. The next prime is 21616593247. The reversal of 21616593246 is 64239561612.

21616593246 is a `hidden beast` number, since 2 + 1 + 6 + 16 + 593 + 2 + 46 = 666.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21616593247) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 214761 + ... + 298923.

It is an arithmetic number, because the mean of its divisors is an integer number (1028484080).

Almost surely, 2^21616593246 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 21616593246, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (24683617920).

21616593246 is an abundant number, since it is smaller than the sum of its proper divisors (27750642594).

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

21616593246 is a wasteful number, since it uses less digits than its factorization.

21616593246 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 84941 (or 84938 counting only the distinct ones).

The product of its digits is 466560, while the sum is 45.

The spelling of 21616593246 in words is "twenty-one billion, six hundred sixteen million, five hundred ninety-three thousand, two hundred forty-six".