1728213749216 has 24 divisors (see below), whose sum is σ = 3402710415720. Its totient is φ = 864033326208.

The previous prime is 1728213749177. The next prime is 1728213749237. The reversal of 1728213749216 is 6129473128271.

It is a happy number.

It is a super-2 number, since 2×1728213749216² (a number of 25 digits) contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1915571 + ... + 2669426.

It is an arithmetic number, because the mean of its divisors is an integer number (141779600655).

Almost surely, 2^{1728213749216} is an apocalyptic number.

1728213749216 is a gapful number since it is divisible by the number (16) formed by its first and last digit.

It is an amenable number.

1728213749216 is a deficient number, since it is larger than the sum of its proper divisors (1674496666504).

1728213749216 is a wasteful number, since it uses less digits than its factorization.

1728213749216 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4596786 (or 4596778 counting only the distinct ones).

The product of its digits is 2032128, while the sum is 53.

The spelling of 1728213749216 in words is "one trillion, seven hundred twenty-eight billion, two hundred thirteen million, seven hundred forty-nine thousand, two hundred sixteen".