63843948421 has 8 divisors (see below), whose sum is σ = 70091563104. Its totient is φ = 57670270320.

The previous prime is 63843948419. The next prime is 63843948433. The reversal of 63843948421 is 12484934836.

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 63843948421 - 2¹ = 63843948419 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (63843948461) 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, 18482335 + ... + 18485788.

It is an arithmetic number, because the mean of its divisors is an integer number (8761445388).

Almost surely, 2^63843948421 is an apocalyptic number.

It is an amenable number.

63843948421 is a deficient number, since it is larger than the sum of its proper divisors (6247614683).

63843948421 is a wasteful number, since it uses less digits than its factorization.

63843948421 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 36968291.

The product of its digits is 3981312, while the sum is 52.

The spelling of 63843948421 in words is "sixty-three billion, eight hundred forty-three million, nine hundred forty-eight thousand, four hundred twenty-one".