809061136 has 45 divisors (see below), whose sum is σ = 1700521461. Its totient is φ = 372730176.

The previous prime is 809061119. The next prime is 809061137. The reversal of 809061136 is 631160908.

The square root of 809061136 is 28444.

It is a perfect power (a square), and thus also a powerful number.

It can be written as a sum of positive squares in only one way, i.e., 119683600 + 689377536 = 10940^2 + 26256^2 .

It is a super-2 number, since 2×809061136² = 1309159843571220992, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (809061137) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 8 ways as a sum of consecutive naturals, for example, 1478815 + ... + 1479361.

Almost surely, 2^809061136 is an apocalyptic number.

809061136 is the 28444-th square number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 809061136

809061136 is an abundant number, since it is smaller than the sum of its proper divisors (891460325).

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

809061136 is an equidigital number, since it uses as much as digits as its factorization.

809061136 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1128 (or 562 counting only the distinct ones).

The product of its (nonzero) digits is 7776, while the sum is 34.

The cubic root of 809061136 is about 931.8094559105.

The spelling of 809061136 in words is "eight hundred nine million, sixty-one thousand, one hundred thirty-six".