321664723742046 has 32 divisors (see below), whose sum is σ = 655500784498560. Its totient is φ = 105193222396704.

The previous prime is 321664723741919. The next prime is 321664723742101. The reversal of 321664723742046 is 640247327466123.

It is a super-2 number, since 2×321664723742046² (a number of 30 digits) contains 22 as substring.

It is a Curzon number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 19178116 + ... + 31798263.

It is an arithmetic number, because the mean of its divisors is an integer number (20484399515580).

Almost surely, 2^{321664723742046} is an apocalyptic number.

321664723742046 is an abundant number, since it is smaller than the sum of its proper divisors (333836060756514).

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

321664723742046 is a wasteful number, since it uses less digits than its factorization.

321664723742046 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 50996280.

The product of its (nonzero) digits is 48771072, while the sum is 57.

The spelling of 321664723742046 in words is "three hundred twenty-one trillion, six hundred sixty-four billion, seven hundred twenty-three million, seven hundred forty-two thousand, forty-six".