188064491 has 8 divisors (see below), whose sum is σ = 197494944. Its totient is φ = 178738560.

The previous prime is 188064433. The next prime is 188064533. The reversal of 188064491 is 194460881.

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-188064491 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (188064091) 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, 22430 + ... + 29651.

It is an arithmetic number, because the mean of its divisors is an integer number (24686868).

Almost surely, 2^188064491 is an apocalyptic number.

188064491 is a deficient number, since it is larger than the sum of its proper divisors (9430453).

188064491 is a wasteful number, since it uses less digits than its factorization.

188064491 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 52261.

The product of its (nonzero) digits is 55296, while the sum is 41.

The square root of 188064491 is about 13713.6607439443. The cubic root of 188064491 is about 572.9309288339.

The spelling of 188064491 in words is "one hundred eighty-eight million, sixty-four thousand, four hundred ninety-one".