1721849344972 has 12 divisors (see below), whose sum is σ = 3013268280120. Its totient is φ = 860915550656.

The previous prime is 1721849344961. The next prime is 1721849344981. The reversal of 1721849344972 is 2794439481271.

It is a happy number.

It is a self number, because there is not a number n which added to its sum of digits gives 1721849344972.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1846573 + ... + 2617924.

It is an arithmetic number, because the mean of its divisors is an integer number (251105690010).

Almost surely, 2^{1721849344972} is an apocalyptic number.

It is an amenable number.

1721849344972 is a deficient number, since it is larger than the sum of its proper divisors (1291418935148).

1721849344972 is a wasteful number, since it uses less digits than its factorization.

1721849344972 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4560920 (or 4560918 counting only the distinct ones).

The product of its digits is 24385536, while the sum is 61.

The spelling of 1721849344972 in words is "one trillion, seven hundred twenty-one billion, eight hundred forty-nine million, three hundred forty-four thousand, nine hundred seventy-two".