1581608112 has 80 divisors (see below), whose sum is σ = 4778146560. Its totient is φ = 441374976.

The previous prime is 1581608111. The next prime is 1581608137. The reversal of 1581608112 is 2118061851.

It is not an unprimeable number, because it can be changed into a prime (1581608111) 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, 40287 + ... + 69182.

It is an arithmetic number, because the mean of its divisors is an integer number (59726832).

Almost surely, 2^1581608112 is an apocalyptic number.

1581608112 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

1581608112 is an abundant number, since it is smaller than the sum of its proper divisors (3196538448).

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

1581608112 is a wasteful number, since it uses less digits than its factorization.

1581608112 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 109530 (or 109524 counting only the distinct ones).

The product of its (nonzero) digits is 3840, while the sum is 33.

The square root of 1581608112 is about 39769.4369082591. The cubic root of 1581608112 is about 1165.1082959738.

Adding to 1581608112 its reverse (2118061851), we get a palindrome (3699669963).

The spelling of 1581608112 in words is "one billion, five hundred eighty-one million, six hundred eight thousand, one hundred twelve".