164520551 has 8 divisors (see below), whose sum is σ = 178239264. Its totient is φ = 150953760.

The previous prime is 164520547. The next prime is 164520569. The reversal of 164520551 is 155025461.

It is a happy number.

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

It is a cyclic number.

It is not a de Polignac number, because 164520551 - 2² = 164520547 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 (164520151) 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, 35720 + ... + 40061.

It is an arithmetic number, because the mean of its divisors is an integer number (22279908).

Almost surely, 2^164520551 is an apocalyptic number.

164520551 is a deficient number, since it is larger than the sum of its proper divisors (13718713).

164520551 is a wasteful number, since it uses less digits than its factorization.

164520551 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 75961.

The product of its (nonzero) digits is 6000, while the sum is 29.

The square root of 164520551 is about 12826.5564747519. The cubic root of 164520551 is about 547.9488903530.

The spelling of 164520551 in words is "one hundred sixty-four million, five hundred twenty thousand, five hundred fifty-one".