1091447952480 has 336 divisors, whose sum is σ = 3868698035664. Its totient is φ = 290853504000.

The previous prime is 1091447952443. The next prime is 1091447952481. The reversal of 1091447952480 is 842597441901.

1091447952480 is a `hidden beast` number, since 1 + 0 + 9 + 1 + 44 + 79 + 52 + 480 = 666.

It is a Harshad number since it is a multiple of its sum of digits (54).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1091447952481) by changing a digit.

It is a polite number, since it can be written in 55 ways as a sum of consecutive naturals, for example, 262554562 + ... + 262558718.

It is an arithmetic number, because the mean of its divisors is an integer number (11513982249).

Almost surely, 2^{1091447952480} is an apocalyptic number.

1091447952480 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 1091447952480, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1934349017832).

1091447952480 is an abundant number, since it is smaller than the sum of its proper divisors (2777250083184).

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

1091447952480 is an equidigital number, since it uses as much as digits as its factorization.

1091447952480 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6441 (or 6418 counting only the distinct ones).

The product of its (nonzero) digits is 2903040, while the sum is 54.

The spelling of 1091447952480 in words is "one trillion, ninety-one billion, four hundred forty-seven million, nine hundred fifty-two thousand, four hundred eighty".