191011064 has 8 divisors (see below), whose sum is σ = 358145760. Its totient is φ = 95505528.

The previous prime is 191011063. The next prime is 191011097. The reversal of 191011064 is 460110191.

191011064 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a tau number, because it is divible by the number of its divisors (8).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (191011063) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 11938184 + ... + 11938199.

It is an arithmetic number, because the mean of its divisors is an integer number (44768220).

Almost surely, 2^191011064 is an apocalyptic number.

It is an amenable number.

191011064 is a deficient number, since it is larger than the sum of its proper divisors (167134696).

191011064 is a wasteful number, since it uses less digits than its factorization.

191011064 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 23876389 (or 23876385 counting only the distinct ones).

The product of its (nonzero) digits is 216, while the sum is 23.

The square root of 191011064 is about 13820.6752367603. The cubic root of 191011064 is about 575.9076417632.

The spelling of 191011064 in words is "one hundred ninety-one million, eleven thousand, sixty-four".