1199577720660 has 144 divisors (see below), whose sum is σ = 3705068316096. Its totient is φ = 289771328000.

The previous prime is 1199577720659. The next prime is 1199577720683. The reversal of 1199577720660 is 660277759911.

It is a Harshad number since it is a multiple of its sum of digits (60).

It is a junction number, because it is equal to n+sod(n) for n = 1199577720594 and 1199577720603.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 1746055 + ... + 2334065.

It is an arithmetic number, because the mean of its divisors is an integer number (25729641084).

Almost surely, 2^{1199577720660} is an apocalyptic number.

1199577720660 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 1199577720660, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1852534158048).

1199577720660 is an abundant number, since it is smaller than the sum of its proper divisors (2505490595436).

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

1199577720660 is a wasteful number, since it uses less digits than its factorization.

1199577720660 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 588326 (or 588313 counting only the distinct ones).

The product of its (nonzero) digits is 10001880, while the sum is 60.

The spelling of 1199577720660 in words is "one trillion, one hundred ninety-nine billion, five hundred seventy-seven million, seven hundred twenty thousand, six hundred sixty".