213344563646 has 4 divisors (see below), whose sum is σ = 320016845472. Its totient is φ = 106672281822.

The previous prime is 213344563631. The next prime is 213344563651. The reversal of 213344563646 is 646365443312.

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

It is a super-3 number, since 3×213344563646³ (a number of 35 digits) contains 333 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 213344563646.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 53336140910 + ... + 53336140913.

It is an arithmetic number, because the mean of its divisors is an integer number (80004211368).

Almost surely, 2^213344563646 is an apocalyptic number.

213344563646 is a deficient number, since it is larger than the sum of its proper divisors (106672281826).

213344563646 is a wasteful number, since it uses less digits than its factorization.

213344563646 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 106672281825.

The product of its digits is 3732480, while the sum is 47.

The spelling of 213344563646 in words is "two hundred thirteen billion, three hundred forty-four million, five hundred sixty-three thousand, six hundred forty-six".