11747486891 has 8 divisors (see below), whose sum is σ = 13468595424. Its totient is φ = 10037102400.

The previous prime is 11747486819. The next prime is 11747486899. The reversal of 11747486891 is 19868474711.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-11747486891 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (11747486899) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2678660 + ... + 2683041.

It is an arithmetic number, because the mean of its divisors is an integer number (1683574428).

Almost surely, 2^11747486891 is an apocalyptic number.

11747486891 is a deficient number, since it is larger than the sum of its proper divisors (1721108533).

11747486891 is an equidigital number, since it uses as much as digits as its factorization.

11747486891 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5362021.

The product of its digits is 2709504, while the sum is 56.

The spelling of 11747486891 in words is "eleven billion, seven hundred forty-seven million, four hundred eighty-six thousand, eight hundred ninety-one".