164551863 has 8 divisors (see below), whose sum is σ = 250745728. Its totient is φ = 94029624.

The previous prime is 164551861. The next prime is 164551879. The reversal of 164551863 is 368155461.

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

It is not a de Polignac number, because 164551863 - 2¹ = 164551861 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (164551861) 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, 3917881 + ... + 3917922.

It is an arithmetic number, because the mean of its divisors is an integer number (31343216).

Almost surely, 2^164551863 is an apocalyptic number.

164551863 is a deficient number, since it is larger than the sum of its proper divisors (86193865).

164551863 is an equidigital number, since it uses as much as digits as its factorization.

164551863 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7835813.

The product of its digits is 86400, while the sum is 39.

The square root of 164551863 is about 12827.7770092873. Note that the first 3 decimals coincide. The cubic root of 164551863 is about 547.9836505236.

The spelling of 164551863 in words is "one hundred sixty-four million, five hundred fifty-one thousand, eight hundred sixty-three".