1644101734456 has 16 divisors (see below), whose sum is σ = 3119831605800. Its totient is φ = 812146639584.

The previous prime is 1644101734441. The next prime is 1644101734501. The reversal of 1644101734456 is 6544371014461.

It is a super-3 number, since 3×1644101734456³ (a number of 38 digits) contains 333 as substring.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1238027751 + ... + 1238029078.

Almost surely, 2^{1644101734456} is an apocalyptic number.

It is an amenable number.

1644101734456 is a deficient number, since it is larger than the sum of its proper divisors (1475729871344).

1644101734456 is a wasteful number, since it uses less digits than its factorization.

1644101734456 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2476056918 (or 2476056914 counting only the distinct ones).

The product of its (nonzero) digits is 967680, while the sum is 46.

The spelling of 1644101734456 in words is "one trillion, six hundred forty-four billion, one hundred one million, seven hundred thirty-four thousand, four hundred fifty-six".