421643512234165 has 32 divisors (see below), whose sum is σ = 547702409270016. Its totient is φ = 309765123264000.

The previous prime is 421643512234127. The next prime is 421643512234169. The reversal of 421643512234165 is 561432215346124.

It is a happy number.

It is not a de Polignac number, because 421643512234165 - 2¹⁵ = 421643512201397 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (421643512234169) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 1096177 + ... + 29060086.

It is an arithmetic number, because the mean of its divisors is an integer number (17115700289688).

Almost surely, 2^{421643512234165} is an apocalyptic number.

It is an amenable number.

421643512234165 is a deficient number, since it is larger than the sum of its proper divisors (126058897035851).

421643512234165 is a wasteful number, since it uses less digits than its factorization.

421643512234165 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 30157389.

The product of its digits is 4147200, while the sum is 49.

The spelling of 421643512234165 in words is "four hundred twenty-one trillion, six hundred forty-three billion, five hundred twelve million, two hundred thirty-four thousand, one hundred sixty-five".