421997777328 has 40 divisors (see below), whose sum is σ = 1090307075008. Its totient is φ = 140647067712.

The previous prime is 421997777303. The next prime is 421997777381. The reversal of 421997777328 is 823777799124.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 225226 + ... + 945897.

Almost surely, 2^421997777328 is an apocalyptic number.

421997777328 is a gapful number since it is divisible by the number (48) formed by its first and last digit.

It is an amenable number.

421997777328 is an abundant number, since it is smaller than the sum of its proper divisors (668309297680).

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

421997777328 is a wasteful number, since it uses less digits than its factorization.

421997777328 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1178641 (or 1178635 counting only the distinct ones).

The product of its digits is 74680704, while the sum is 66.

The spelling of 421997777328 in words is "four hundred twenty-one billion, nine hundred ninety-seven million, seven hundred seventy-seven thousand, three hundred twenty-eight".