1644450457102 has 16 divisors (see below), whose sum is σ = 2601704160000. Its totient is φ = 777389185080.

The previous prime is 1644450457099. The next prime is 1644450457123. The reversal of 1644450457102 is 2017540544461.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 43342774 + ... + 43380697.

It is an arithmetic number, because the mean of its divisors is an integer number (162606510000).

Almost surely, 2^{1644450457102} is an apocalyptic number.

1644450457102 is a deficient number, since it is larger than the sum of its proper divisors (957253702898).

1644450457102 is a wasteful number, since it uses less digits than its factorization.

1644450457102 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 86723991.

The product of its (nonzero) digits is 537600, while the sum is 43.

The spelling of 1644450457102 in words is "one trillion, six hundred forty-four billion, four hundred fifty million, four hundred fifty-seven thousand, one hundred two".