1161803656 has 16 divisors (see below), whose sum is σ = 2345949900. Its totient is φ = 536217024.

The previous prime is 1161803569. The next prime is 1161803683. The reversal of 1161803656 is 6563081611.

It can be written as a sum of positive squares in 2 ways, for example, as 1104498756 + 57304900 = 33234^2 + 7570^2 .

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 5585491 + ... + 5585698.

Almost surely, 2^1161803656 is an apocalyptic number.

It is an amenable number.

1161803656 is an abundant number, since it is smaller than the sum of its proper divisors (1184146244).

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

1161803656 is a wasteful number, since it uses less digits than its factorization.

1161803656 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11171208 (or 11171204 counting only the distinct ones).

The product of its (nonzero) digits is 25920, while the sum is 37.

The square root of 1161803656 is about 34085.2410289263. The cubic root of 1161803656 is about 1051.2618709563.

The spelling of 1161803656 in words is "one billion, one hundred sixty-one million, eight hundred three thousand, six hundred fifty-six".