1644630546322 has 64 divisors (see below), whose sum is σ = 2630174146560. Its totient is φ = 769096080000.

The previous prime is 1644630546319. The next prime is 1644630546329. The reversal of 1644630546322 is 2236450364461.

It is a happy number.

It is not an unprimeable number, because it can be changed into a prime (1644630546329) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 1428870447 + ... + 1428871597.

It is an arithmetic number, because the mean of its divisors is an integer number (41096471040).

Almost surely, 2^{1644630546322} is an apocalyptic number.

1644630546322 is a deficient number, since it is larger than the sum of its proper divisors (985543600238).

1644630546322 is a wasteful number, since it uses less digits than its factorization.

1644630546322 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2647.

The product of its (nonzero) digits is 2488320, while the sum is 46.

The spelling of 1644630546322 in words is "one trillion, six hundred forty-four billion, six hundred thirty million, five hundred forty-six thousand, three hundred twenty-two".