1091673784320 has 608 divisors, whose sum is σ = 4229058325248. Its totient is φ = 234746806272.

The previous prime is 1091673784291. The next prime is 1091673784321. The reversal of 1091673784320 is 234873761901.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (51).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1091673784321) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 467925874 + ... + 467928206.

Almost surely, 2^{1091673784320} is an apocalyptic number.

1091673784320 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 1091673784320, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2114529162624).

1091673784320 is an abundant number, since it is smaller than the sum of its proper divisors (3137384540928).

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

1091673784320 is an frugal number, since it uses more digits than its factorization.

1091673784320 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2401 (or 2367 counting only the distinct ones).

The product of its (nonzero) digits is 1524096, while the sum is 51.

The spelling of 1091673784320 in words is "one trillion, ninety-one billion, six hundred seventy-three million, seven hundred eighty-four thousand, three hundred twenty".