264191091 has 8 divisors (see below), whose sum is σ = 352334784. Its totient is φ = 176087400.

The previous prime is 264191069. The next prime is 264191099. The reversal of 264191091 is 190191462.

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

It is not a de Polignac number, because 264191091 - 2⁷ = 264190963 is a prime.

It is not an unprimeable number, because it can be changed into a prime (264191099) 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, 12916 + ... + 26366.

It is an arithmetic number, because the mean of its divisors is an integer number (44041848).

Almost surely, 2^264191091 is an apocalyptic number.

264191091 is a deficient number, since it is larger than the sum of its proper divisors (88143693).

264191091 is a wasteful number, since it uses less digits than its factorization.

264191091 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 20001.

The product of its (nonzero) digits is 3888, while the sum is 33.

The square root of 264191091 is about 16253.9561645773. The cubic root of 264191091 is about 641.6616092103.

The spelling of 264191091 in words is "two hundred sixty-four million, one hundred ninety-one thousand, ninety-one".