68164491 has 8 divisors (see below), whose sum is σ = 90924544. Its totient is φ = 45423720.

The previous prime is 68164489. The next prime is 68164501. The reversal of 68164491 is 19446186.

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

It is not a de Polignac number, because 68164491 - 2¹ = 68164489 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (68164091) 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, 9570 + ... + 15096.

It is an arithmetic number, because the mean of its divisors is an integer number (11365568).

Almost surely, 2^68164491 is an apocalyptic number.

68164491 is a deficient number, since it is larger than the sum of its proper divisors (22760053).

68164491 is a wasteful number, since it uses less digits than its factorization.

68164491 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9641.

The product of its digits is 41472, while the sum is 39.

The square root of 68164491 is about 8256.1789588162. The cubic root of 68164491 is about 408.4943606282.

The spelling of 68164491 in words is "sixty-eight million, one hundred sixty-four thousand, four hundred ninety-one".