21427411571265 has 64 divisors (see below), whose sum is σ = 41344481894400. Its totient is φ = 9264226312704.

The previous prime is 21427411571207. The next prime is 21427411571281. The reversal of 21427411571265 is 56217511472412.

It is not a de Polignac number, because 21427411571265 - 2⁸ = 21427411571009 is a prime.

It is an unprimeable number.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 49631325 + ... + 50061194.

It is an arithmetic number, because the mean of its divisors is an integer number (646007529600).

Almost surely, 2^{21427411571265} is an apocalyptic number.

It is an amenable number.

21427411571265 is a deficient number, since it is larger than the sum of its proper divisors (19917070323135).

21427411571265 is a wasteful number, since it uses less digits than its factorization.

21427411571265 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 99692646.

The product of its digits is 940800, while the sum is 48.

The spelling of 21427411571265 in words is "twenty-one trillion, four hundred twenty-seven billion, four hundred eleven million, five hundred seventy-one thousand, two hundred sixty-five".