21155336616266 has 32 divisors (see below), whose sum is σ = 32037020660736. Its totient is φ = 10476936576000.

The previous prime is 21155336616247. The next prime is 21155336616283. The reversal of 21155336616266 is 66261663355112.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 74898986 + ... + 75180906.

It is an arithmetic number, because the mean of its divisors is an integer number (1001156895648).

Almost surely, 2^{21155336616266} is an apocalyptic number.

21155336616266 is a deficient number, since it is larger than the sum of its proper divisors (10881684044470).

21155336616266 is a wasteful number, since it uses less digits than its factorization.

21155336616266 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 282998.

The product of its digits is 6998400, while the sum is 53.

The spelling of 21155336616266 in words is "twenty-one trillion, one hundred fifty-five billion, three hundred thirty-six million, six hundred sixteen thousand, two hundred sixty-six".