1721942660736 has 192 divisors, whose sum is σ = 5092753985280. Its totient is φ = 558187628544.

The previous prime is 1721942660723. The next prime is 1721942660743. The reversal of 1721942660736 is 6370662491271.

1721942660736 is a `hidden beast` number, since 1 + 7 + 2 + 1 + 9 + 4 + 26 + 607 + 3 + 6 = 666.

It is a tau number, because it is divible by the number of its divisors (192).

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 8399325 + ... + 8601891.

It is an arithmetic number, because the mean of its divisors is an integer number (26524760340).

Almost surely, 2^{1721942660736} is an apocalyptic number.

1721942660736 is a gapful number since it is divisible by the number (16) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1721942660736, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2546376992640).

1721942660736 is an abundant number, since it is smaller than the sum of its proper divisors (3370811324544).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1721942660736 is a wasteful number, since it uses less digits than its factorization.

1721942660736 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 202791 (or 202776 counting only the distinct ones).

The product of its (nonzero) digits is 4572288, while the sum is 54.

The spelling of 1721942660736 in words is "one trillion, seven hundred twenty-one billion, nine hundred forty-two million, six hundred sixty thousand, seven hundred thirty-six".