421137638775 has 48 divisors (see below), whose sum is σ = 884166227200. Its totient is φ = 192520061280.

The previous prime is 421137638759. The next prime is 421137638797. The reversal of 421137638775 is 577836731124.

421137638775 is a `hidden beast` number, since 421 + 1 + 3 + 76 + 3 + 87 + 75 = 666.

It is not a de Polignac number, because 421137638775 - 2⁴ = 421137638759 is a prime.

It is a congruent number.

It is an unprimeable number.

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, 44560105 + ... + 44569554.

Almost surely, 2^421137638775 is an apocalyptic number.

421137638775 is a gapful number since it is divisible by the number (45) formed by its first and last digit.

421137638775 is an abundant number, since it is smaller than the sum of its proper divisors (463028588425).

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

421137638775 is a wasteful number, since it uses less digits than its factorization.

421137638775 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 89129685 (or 89129674 counting only the distinct ones).

The product of its digits is 5927040, while the sum is 54.

The spelling of 421137638775 in words is "four hundred twenty-one billion, one hundred thirty-seven million, six hundred thirty-eight thousand, seven hundred seventy-five".