164671690 has 32 divisors (see below), whose sum is σ = 323979264. Its totient is φ = 59992320.

The previous prime is 164671687. The next prime is 164671769. The reversal of 164671690 is 96176461.

It is a super-2 number, since 2×164671690² = 54233530974912200, which contains 22 as substring.

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, 10354 + ... + 20893.

It is an arithmetic number, because the mean of its divisors is an integer number (10124352).

Almost surely, 2^164671690 is an apocalyptic number.

164671690 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

164671690 is a deficient number, since it is larger than the sum of its proper divisors (159307574).

164671690 is a wasteful number, since it uses less digits than its factorization.

164671690 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 31302.

The product of its (nonzero) digits is 54432, while the sum is 40.

The square root of 164671690 is about 12832.4467659134. The cubic root of 164671690 is about 548.1166325178.

The spelling of 164671690 in words is "one hundred sixty-four million, six hundred seventy-one thousand, six hundred ninety".