164821374 has 12 divisors (see below), whose sum is σ = 357113016. Its totient is φ = 54940452.

The previous prime is 164821373. The next prime is 164821399. The reversal of 164821374 is 473128461.

164821374 is a `hidden beast` number, since 1 + 648 + 2 + 1 + 3 + 7 + 4 = 666.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (164821373) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 4578354 + ... + 4578389.

It is an arithmetic number, because the mean of its divisors is an integer number (29759418).

Almost surely, 2^164821374 is an apocalyptic number.

164821374 is an abundant number, since it is smaller than the sum of its proper divisors (192291642).

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

164821374 is a wasteful number, since it uses less digits than its factorization.

164821374 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9156751 (or 9156748 counting only the distinct ones).

The product of its digits is 32256, while the sum is 36.

The square root of 164821374 is about 12838.2776882259. The cubic root of 164821374 is about 548.2826587153.

The spelling of 164821374 in words is "one hundred sixty-four million, eight hundred twenty-one thousand, three hundred seventy-four".