11681811995 has 32 divisors (see below), whose sum is σ = 16547721216. Its totient is φ = 7747228800.

The previous prime is 11681811989. The next prime is 11681812003. The reversal of 11681811995 is 59911818611.

It is a happy number.

It is not a de Polignac number, because 11681811995 - 2¹² = 11681807899 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 3163100 + ... + 3166790.

It is an arithmetic number, because the mean of its divisors is an integer number (517116288).

Almost surely, 2^11681811995 is an apocalyptic number.

11681811995 is a deficient number, since it is larger than the sum of its proper divisors (4865909221).

11681811995 is a wasteful number, since it uses less digits than its factorization.

11681811995 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6651.

The product of its digits is 155520, while the sum is 50.

The spelling of 11681811995 in words is "eleven billion, six hundred eighty-one million, eight hundred eleven thousand, nine hundred ninety-five".