11561996 has 6 divisors (see below), whose sum is σ = 20233500. Its totient is φ = 5780996.

The previous prime is 11561971. The next prime is 11561999. The reversal of 11561996 is 69916511.

It is a happy number.

It is not an unprimeable number, because it can be changed into a prime (11561999) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1445246 + ... + 1445253.

It is an arithmetic number, because the mean of its divisors is an integer number (3372250).

Almost surely, 2^11561996 is an apocalyptic number.

It is an amenable number.

11561996 is a deficient number, since it is larger than the sum of its proper divisors (8671504).

11561996 is a wasteful number, since it uses less digits than its factorization.

11561996 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2890503 (or 2890501 counting only the distinct ones).

The product of its digits is 14580, while the sum is 38.

The square root of 11561996 is about 3400.2935167423. The cubic root of 11561996 is about 226.1227568147.

The spelling of 11561996 in words is "eleven million, five hundred sixty-one thousand, nine hundred ninety-six".