1081891054560 has 192 divisors, whose sum is σ = 3489442612992. Its totient is φ = 281682272256.

The previous prime is 1081891054553. The next prime is 1081891054583. The reversal of 1081891054560 is 654501981801.

It is a Harshad number since it is a multiple of its sum of digits (48).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 3485227 + ... + 3782933.

It is an arithmetic number, because the mean of its divisors is an integer number (18174180276).

Almost surely, 2^{1081891054560} is an apocalyptic number.

1081891054560 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 1081891054560, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1744721306496).

1081891054560 is an abundant number, since it is smaller than the sum of its proper divisors (2407551558432).

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

1081891054560 is a wasteful number, since it uses less digits than its factorization.

1081891054560 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 297905 (or 297897 counting only the distinct ones).

The product of its (nonzero) digits is 345600, while the sum is 48.

The spelling of 1081891054560 in words is "one trillion, eighty-one billion, eight hundred ninety-one million, fifty-four thousand, five hundred sixty".