1081566612 has 108 divisors (see below), whose sum is σ = 3189382560. Its totient is φ = 308139552.

The previous prime is 1081566599. The next prime is 1081566623. The reversal of 1081566612 is 2166651801.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 35 ways as a sum of consecutive naturals, for example, 858439 + ... + 859697.

It is an arithmetic number, because the mean of its divisors is an integer number (29531320).

Almost surely, 2^1081566612 is an apocalyptic number.

1081566612 is a gapful number since it is divisible by the number (12) 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 1081566612, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1594691280).

1081566612 is an abundant number, since it is smaller than the sum of its proper divisors (2107815948).

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

1081566612 is a wasteful number, since it uses less digits than its factorization.

1081566612 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1770 (or 1758 counting only the distinct ones).

The product of its (nonzero) digits is 17280, while the sum is 36.

The square root of 1081566612 is about 32887.1800554563. The cubic root of 1081566612 is about 1026.4814151519.

The spelling of 1081566612 in words is "one billion, eighty-one million, five hundred sixty-six thousand, six hundred twelve".