426624671221 has 8 divisors (see below), whose sum is σ = 491078759360. Its totient is φ = 363047509728.

The previous prime is 426624671167. The next prime is 426624671233. The reversal of 426624671221 is 122176426624.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 426624671221 - 2⁷ = 426624671093 is a prime.

It is a super-2 number, since 2×426624671221² (a number of 24 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (426624671251) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 219230616 + ... + 219232561.

It is an arithmetic number, because the mean of its divisors is an integer number (61384844920).

Almost surely, 2^426624671221 is an apocalyptic number.

It is an amenable number.

426624671221 is a deficient number, since it is larger than the sum of its proper divisors (64454088139).

426624671221 is a wasteful number, since it uses less digits than its factorization.

426624671221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 438463323.

The product of its digits is 387072, while the sum is 43.

The spelling of 426624671221 in words is "four hundred twenty-six billion, six hundred twenty-four million, six hundred seventy-one thousand, two hundred twenty-one".