21616414044663 has 16 divisors (see below), whose sum is σ = 30105216760320. Its totient is φ = 13778926121184.

The previous prime is 21616414044653. The next prime is 21616414044679. The reversal of 21616414044663 is 36644041461612.

It is not a de Polignac number, because 21616414044663 - 2¹³ = 21616414036471 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21616414044653) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1206129531 + ... + 1206147452.

It is an arithmetic number, because the mean of its divisors is an integer number (1881576047520).

Almost surely, 2^{21616414044663} is an apocalyptic number.

21616414044663 is a deficient number, since it is larger than the sum of its proper divisors (8488802715657).

21616414044663 is a wasteful number, since it uses less digits than its factorization.

21616414044663 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2412277118.

The product of its (nonzero) digits is 1990656, while the sum is 48.

The spelling of 21616414044663 in words is "twenty-one trillion, six hundred sixteen billion, four hundred fourteen million, forty-four thousand, six hundred sixty-three".