421776867643 has 8 divisors (see below), whose sum is σ = 453252754512. Its totient is φ = 391041590016.

The previous prime is 421776867613. The next prime is 421776867649. The reversal of 421776867643 is 346768677124.

It is a happy number.

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 421776867643 - 2²⁹ = 421239996731 is a prime.

It is not an unprimeable number, because it can be changed into a prime (421776867649) by changing a digit.

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 7 ways as a sum of consecutive naturals, for example, 185151130 + ... + 185153407.

It is an arithmetic number, because the mean of its divisors is an integer number (56656594314).

Almost surely, 2^421776867643 is an apocalyptic number.

421776867643 is a deficient number, since it is larger than the sum of its proper divisors (31475886869).

421776867643 is a wasteful number, since it uses less digits than its factorization.

421776867643 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 370304621.

The product of its digits is 56899584, while the sum is 61.

The spelling of 421776867643 in words is "four hundred twenty-one billion, seven hundred seventy-six million, eight hundred sixty-seven thousand, six hundred forty-three".