421334481645 has 48 divisors (see below), whose sum is σ = 910520237952. Its totient is φ = 175100042880.

The previous prime is 421334481613. The next prime is 421334481679. The reversal of 421334481645 is 546184433124.

421334481645 is a `hidden beast` number, since 42 + 1 + 3 + 3 + 448 + 164 + 5 = 666.

It is not a de Polignac number, because 421334481645 - 2⁵ = 421334481613 is a prime.

It is a super-3 number, since 3×421334481645³ (a number of 36 digits) contains 333 as substring.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 421334481645.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 60795162 + ... + 60802091.

It is an arithmetic number, because the mean of its divisors is an integer number (18969171624).

Almost surely, 2^421334481645 is an apocalyptic number.

421334481645 is a gapful number since it is divisible by the number (45) formed by its first and last digit.

It is an amenable number.

421334481645 is an abundant number, since it is smaller than the sum of its proper divisors (489185756307).

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

421334481645 is a wasteful number, since it uses less digits than its factorization.

421334481645 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 121597282 (or 121597279 counting only the distinct ones).

The product of its digits is 1105920, while the sum is 45.

The spelling of 421334481645 in words is "four hundred twenty-one billion, three hundred thirty-four million, four hundred eighty-one thousand, six hundred forty-five".