421356657916 has 12 divisors (see below), whose sum is σ = 769433897232. Its totient is φ = 201518401568.

The previous prime is 421356657881. The next prime is 421356657929. The reversal of 421356657916 is 619756653124.

It is a happy number.

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 3 ways as a sum of consecutive naturals, for example, 2289981745 + ... + 2289981928.

It is an arithmetic number, because the mean of its divisors is an integer number (64119491436).

Almost surely, 2^421356657916 is an apocalyptic number.

421356657916 is a gapful number since it is divisible by the number (46) formed by its first and last digit.

It is an amenable number.

421356657916 is a deficient number, since it is larger than the sum of its proper divisors (348077239316).

421356657916 is a wasteful number, since it uses less digits than its factorization.

421356657916 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4579963700 (or 4579963698 counting only the distinct ones).

The product of its digits is 8164800, while the sum is 55.

The spelling of 421356657916 in words is "four hundred twenty-one billion, three hundred fifty-six million, six hundred fifty-seven thousand, nine hundred sixteen".