1821080770560 has 576 divisors, whose sum is σ = 6688828692000. Its totient is φ = 457412444160.

The previous prime is 1821080770547. The next prime is 1821080770577. The reversal of 1821080770560 is 650770801281.

It is a happy number.

1821080770560 is a `hidden beast` number, since 1 + 8 + 2 + 1 + 0 + 80 + 7 + 7 + 0 + 560 = 666.

It is a tau number, because it is divible by the number of its divisors (576).

It is a Harshad number since it is a multiple of its sum of digits (45).

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, 109569931 + ... + 109586549.

Almost surely, 2^{1821080770560} is an apocalyptic number.

1821080770560 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 1821080770560, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (3344414346000).

1821080770560 is an abundant number, since it is smaller than the sum of its proper divisors (4867747921440).

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

1821080770560 is a wasteful number, since it uses less digits than its factorization.

1821080770560 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16722 (or 16699 counting only the distinct ones).

The product of its (nonzero) digits is 188160, while the sum is 45.

The spelling of 1821080770560 in words is "one trillion, eight hundred twenty-one billion, eighty million, seven hundred seventy thousand, five hundred sixty".