421930321965 has 48 divisors (see below), whose sum is σ = 746948442240. Its totient is φ = 220278476160.

The previous prime is 421930321949. The next prime is 421930321973. The reversal of 421930321965 is 569123039124.

421930321965 is a `hidden beast` number, since 421 + 9 + 3 + 0 + 3 + 219 + 6 + 5 = 666.

It is not a de Polignac number, because 421930321965 - 2⁴ = 421930321949 is a prime.

It is a super-2 number, since 2×421930321965² (a number of 24 digits) contains 22 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 421930321965.

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, 111081 + ... + 925310.

It is an arithmetic number, because the mean of its divisors is an integer number (15561425880).

Almost surely, 2^421930321965 is an apocalyptic number.

421930321965 is a gapful number since it is divisible by the number (45) formed by its first and last digit.

It is an amenable number.

421930321965 is a deficient number, since it is larger than the sum of its proper divisors (325018120275).

421930321965 is a wasteful number, since it uses less digits than its factorization.

421930321965 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1036594 (or 1036591 counting only the distinct ones).

The product of its (nonzero) digits is 349920, while the sum is 45.

The spelling of 421930321965 in words is "four hundred twenty-one billion, nine hundred thirty million, three hundred twenty-one thousand, nine hundred sixty-five".