164801919 has 8 divisors (see below), whose sum is σ = 225095472. Its totient is φ = 107188160.

The previous prime is 164801891. The next prime is 164801951. The reversal of 164801919 is 919108461.

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 164801919 - 2⁵ = 164801887 is a prime.

It is a super-2 number, since 2×164801919² = 54319345012165122, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (164801999) 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, 669804 + ... + 670049.

It is an arithmetic number, because the mean of its divisors is an integer number (28136934).

Almost surely, 2^164801919 is an apocalyptic number.

164801919 is a deficient number, since it is larger than the sum of its proper divisors (60293553).

164801919 is a wasteful number, since it uses less digits than its factorization.

164801919 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1339897.

The product of its (nonzero) digits is 15552, while the sum is 39.

The square root of 164801919 is about 12837.5199707732. The cubic root of 164801919 is about 548.2610853424.

The spelling of 164801919 in words is "one hundred sixty-four million, eight hundred one thousand, nine hundred nineteen".