11261664091 has 4 divisors (see below), whose sum is σ = 11264733832. Its totient is φ = 11258594352.

The previous prime is 11261664061. The next prime is 11261664101. The reversal of 11261664091 is 19046616211.

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 11261664091 - 2¹⁵ = 11261631323 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 11261664091.

It is not an unprimeable number, because it can be changed into a prime (11261664061) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1529361 + ... + 1536706.

It is an arithmetic number, because the mean of its divisors is an integer number (2816183458).

Almost surely, 2^11261664091 is an apocalyptic number.

11261664091 is a deficient number, since it is larger than the sum of its proper divisors (3069741).

11261664091 is an equidigital number, since it uses as much as digits as its factorization.

11261664091 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3069740.

The product of its (nonzero) digits is 15552, while the sum is 37.

The spelling of 11261664091 in words is "eleven billion, two hundred sixty-one million, six hundred sixty-four thousand, ninety-one".