1081558926 has 128 divisors (see below), whose sum is σ = 2962713600. Its totient is φ = 285534720.

The previous prime is 1081558903. The next prime is 1081558927. The reversal of 1081558926 is 6298551801.

It is a happy number.

1081558926 is a `hidden beast` number, since 1 + 0 + 8 + 1 + 558 + 92 + 6 = 666.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1081558927) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 292626 + ... + 296298.

It is an arithmetic number, because the mean of its divisors is an integer number (23146200).

Almost surely, 2^1081558926 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1081558926, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1481356800).

1081558926 is an abundant number, since it is smaller than the sum of its proper divisors (1881154674).

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

1081558926 is a wasteful number, since it uses less digits than its factorization.

1081558926 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3751 (or 3745 counting only the distinct ones).

The product of its (nonzero) digits is 172800, while the sum is 45.

The square root of 1081558926 is about 32887.0632012042. The cubic root of 1081558926 is about 1026.4789836312.

The spelling of 1081558926 in words is "one billion, eighty-one million, five hundred fifty-eight thousand, nine hundred twenty-six".