421827099681 has 48 divisors (see below), whose sum is σ = 650093411520. Its totient is φ = 241754820480.

The previous prime is 421827099667. The next prime is 421827099689. The reversal of 421827099681 is 186990728124.

It is not a de Polignac number, because 421827099681 - 2¹⁰ = 421827098657 is a prime.

It is a super-2 number, since 2×421827099681² (a number of 24 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (57).

It is not an unprimeable number, because it can be changed into a prime (421827099689) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 576751 + ... + 1084571.

It is an arithmetic number, because the mean of its divisors is an integer number (13543612740).

Almost surely, 2^421827099681 is an apocalyptic number.

It is an amenable number.

421827099681 is a deficient number, since it is larger than the sum of its proper divisors (228266311839).

421827099681 is a wasteful number, since it uses less digits than its factorization.

421827099681 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 507934 (or 507915 counting only the distinct ones).

The product of its (nonzero) digits is 3483648, while the sum is 57.

The spelling of 421827099681 in words is "four hundred twenty-one billion, eight hundred twenty-seven million, ninety-nine thousand, six hundred eighty-one".