1720602734640 has 320 divisors, whose sum is σ = 5440031280000. Its totient is φ = 449806336000.

The previous prime is 1720602734633. The next prime is 1720602734693. The reversal of 1720602734640 is 464372060271.

It is a junction number, because it is equal to n+sod(n) for n = 1720602734592 and 1720602734601.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 1621679710 + ... + 1621680770.

It is an arithmetic number, because the mean of its divisors is an integer number (17000097750).

Almost surely, 2^{1720602734640} is an apocalyptic number.

1720602734640 is a gapful number since it is divisible by the number (10) 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 1720602734640, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2720015640000).

1720602734640 is an abundant number, since it is smaller than the sum of its proper divisors (3719428545360).

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

1720602734640 is a wasteful number, since it uses less digits than its factorization.

1720602734640 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1776 (or 1770 counting only the distinct ones).

The product of its (nonzero) digits is 338688, while the sum is 42.

The spelling of 1720602734640 in words is "one trillion, seven hundred twenty billion, six hundred two million, seven hundred thirty-four thousand, six hundred forty".