11642185851 has 4 divisors (see below), whose sum is σ = 15522914472. Its totient is φ = 7761457232.

The previous prime is 11642185843. The next prime is 11642185861. The reversal of 11642185851 is 15858124611.

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

It is a cyclic number.

It is not a de Polignac number, because 11642185851 - 2³ = 11642185843 is a prime.

It is not an unprimeable number, because it can be changed into a prime (11642185831) 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, 1940364306 + ... + 1940364311.

It is an arithmetic number, because the mean of its divisors is an integer number (3880728618).

Almost surely, 2^11642185851 is an apocalyptic number.

11642185851 is a deficient number, since it is larger than the sum of its proper divisors (3880728621).

11642185851 is an equidigital number, since it uses as much as digits as its factorization.

11642185851 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3880728620.

The product of its digits is 76800, while the sum is 42.

The spelling of 11642185851 in words is "eleven billion, six hundred forty-two million, one hundred eighty-five thousand, eight hundred fifty-one".