421376177364218 has 4 divisors (see below), whose sum is σ = 632064266046330. Its totient is φ = 210688088682108.

The previous prime is 421376177364193. The next prime is 421376177364223. The reversal of 421376177364218 is 812463771673124.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 397115499051049 + 24260678313169 = 19927757^2 + 4925513^2 .

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (31) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 105344044341053 + ... + 105344044341056.

Almost surely, 2^{421376177364218} is an apocalyptic number.

421376177364218 is a deficient number, since it is larger than the sum of its proper divisors (210688088682112).

421376177364218 is a wasteful number, since it uses less digits than its factorization.

421376177364218 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 210688088682111.

The product of its digits is 56899584, while the sum is 62.

The spelling of 421376177364218 in words is "four hundred twenty-one trillion, three hundred seventy-six billion, one hundred seventy-seven million, three hundred sixty-four thousand, two hundred eighteen".