21619860225216 has 56 divisors (see below), whose sum is σ = 62402778383424. Its totient is φ = 6551472794880.

The previous prime is 21619860225203. The next prime is 21619860225221. The reversal of 21619860225216 is 61252206891612.

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, 5118336010 + ... + 5118340233.

Almost surely, 2^{21619860225216} is an apocalyptic number.

It is an amenable number.

21619860225216 is an abundant number, since it is smaller than the sum of its proper divisors (40782918158208).

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

21619860225216 is a wasteful number, since it uses less digits than its factorization.

21619860225216 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10236676269 (or 10236676259 counting only the distinct ones).

The product of its (nonzero) digits is 1244160, while the sum is 51.

The spelling of 21619860225216 in words is "twenty-one trillion, six hundred nineteen billion, eight hundred sixty million, two hundred twenty-five thousand, two hundred sixteen".