164911961 has 8 divisors (see below), whose sum is σ = 167042304. Its totient is φ = 162792000.

The previous prime is 164911949. The next prime is 164912003. The reversal of 164911961 is 169119461.

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 164911961 - 2¹⁸ = 164649817 is a prime.

It is a super-3 number, since 3×164911961³ (a number of 26 digits) contains 333 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (164911921) 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, 32336 + ... + 37086.

It is an arithmetic number, because the mean of its divisors is an integer number (20880288).

Almost surely, 2^164911961 is an apocalyptic number.

It is an amenable number.

164911961 is a deficient number, since it is larger than the sum of its proper divisors (2130343).

164911961 is a wasteful number, since it uses less digits than its factorization.

164911961 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5191.

The product of its digits is 11664, while the sum is 38.

The square root of 164911961 is about 12841.8052079916. The cubic root of 164911961 is about 548.3830870024.

The spelling of 164911961 in words is "one hundred sixty-four million, nine hundred eleven thousand, nine hundred sixty-one".