164951864 has 64 divisors (see below), whose sum is σ = 387244800. Its totient is φ = 63993600.

The previous prime is 164951851. The next prime is 164951873. The reversal of 164951864 is 468159461.

It is a Harshad number since it is a multiple of its sum of digits (44).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 203492 + ... + 204300.

It is an arithmetic number, because the mean of its divisors is an integer number (6050700).

Almost surely, 2^164951864 is an apocalyptic number.

164951864 is a gapful number since it is divisible by the number (14) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 164951864, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (193622400).

164951864 is an abundant number, since it is smaller than the sum of its proper divisors (222292936).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

164951864 is a wasteful number, since it uses less digits than its factorization.

164951864 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1164 (or 1160 counting only the distinct ones).

The product of its digits is 207360, while the sum is 44.

The square root of 164951864 is about 12843.3587507318. The cubic root of 164951864 is about 548.4273133591.

The spelling of 164951864 in words is "one hundred sixty-four million, nine hundred fifty-one thousand, eight hundred sixty-four".