1081776361 has 4 divisors (see below), whose sum is σ = 1086419412. Its totient is φ = 1077133312.

The previous prime is 1081776347. The next prime is 1081776373. The reversal of 1081776361 is 1636771801.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 1636771801 = 7 ⋅233824543.

It can be written as a sum of positive squares in 2 ways, for example, as 294637225 + 787139136 = 17165^2 + 28056^2 .

It is a cyclic number.

It is not a de Polignac number, because 1081776361 - 2⁵ = 1081776329 is a prime.

It is a Smith number, since the sum of its digits (40) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1081776331) 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, 2321176 + ... + 2321641.

It is an arithmetic number, because the mean of its divisors is an integer number (271604853).

Almost surely, 2^1081776361 is an apocalyptic number.

It is an amenable number.

1081776361 is a deficient number, since it is larger than the sum of its proper divisors (4643051).

1081776361 is an equidigital number, since it uses as much as digits as its factorization.

1081776361 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4643050.

The product of its (nonzero) digits is 42336, while the sum is 40.

The square root of 1081776361 is about 32890.3688182422. The cubic root of 1081776361 is about 1026.5477662922.

It can be divided in two parts, 10817 and 76361, that added together give a palindrome (87178).

The spelling of 1081776361 in words is "one billion, eighty-one million, seven hundred seventy-six thousand, three hundred sixty-one".