1081581774 has 32 divisors (see below), whose sum is σ = 2662356480. Its totient is φ = 285252192.

The previous prime is 1081581757. The next prime is 1081581779. The reversal of 1081581774 is 4771851801.

It is a Harshad number since it is a multiple of its sum of digits (42).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1081581779) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 989914 + ... + 991005.

It is an arithmetic number, because the mean of its divisors is an integer number (83198640).

Almost surely, 2^1081581774 is an apocalyptic number.

1081581774 is a gapful number since it is divisible by the number (14) formed by its first and last digit.

1081581774 is an abundant number, since it is smaller than the sum of its proper divisors (1580774706).

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

1081581774 is a wasteful number, since it uses less digits than its factorization.

1081581774 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1980944.

The product of its (nonzero) digits is 62720, while the sum is 42.

The square root of 1081581774 is about 32887.4105700038. The cubic root of 1081581774 is about 1026.4862117246.

The spelling of 1081581774 in words is "one billion, eighty-one million, five hundred eighty-one thousand, seven hundred seventy-four".