421336023664 has 20 divisors (see below), whose sum is σ = 817169032656. Its totient is φ = 210453692672.

The previous prime is 421336023653. The next prime is 421336023671. The reversal of 421336023664 is 466320633124.

It is a happy number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 13378729 + ... + 13410184.

Almost surely, 2^421336023664 is an apocalyptic number.

It is an amenable number.

421336023664 is a deficient number, since it is larger than the sum of its proper divisors (395833008992).

421336023664 is a wasteful number, since it uses less digits than its factorization.

421336023664 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 26789904 (or 26789898 counting only the distinct ones).

The product of its (nonzero) digits is 373248, while the sum is 40.

Adding to 421336023664 its reverse (466320633124), we get a palindrome (887656656788).

The spelling of 421336023664 in words is "four hundred twenty-one billion, three hundred thirty-six million, twenty-three thousand, six hundred sixty-four".