1096671581 has 4 divisors (see below), whose sum is σ = 1161181692. Its totient is φ = 1032161472.

The previous prime is 1096671571. The next prime is 1096671599. The reversal of 1096671581 is 1851766901.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 1004319481 + 92352100 = 31691^2 + 9610^2 .

It is a cyclic number.

It is not a de Polignac number, because 1096671581 - 2¹⁸ = 1096409437 is a prime.

It is a super-2 number, since 2×1096671581² = 2405377113146079122, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1096671551) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 32255030 + ... + 32255063.

It is an arithmetic number, because the mean of its divisors is an integer number (290295423).

Almost surely, 2^1096671581 is an apocalyptic number.

It is an amenable number.

1096671581 is a deficient number, since it is larger than the sum of its proper divisors (64510111).

1096671581 is an equidigital number, since it uses as much as digits as its factorization.

1096671581 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 64510110.

The product of its (nonzero) digits is 90720, while the sum is 44.

The square root of 1096671581 is about 33116.0320841734. The cubic root of 1096671581 is about 1031.2378936271.

The spelling of 1096671581 in words is "one billion, ninety-six million, six hundred seventy-one thousand, five hundred eighty-one".