164946690 has 48 divisors (see below), whose sum is σ = 439331256. Its totient is φ = 42912000.

The previous prime is 164946689. The next prime is 164946739. The reversal of 164946690 is 96649461.

164946690 is a `hidden beast` number, since 16 + 494 + 66 + 90 = 666.

It can be written as a sum of positive squares in 4 ways, for example, as 29387241 + 135559449 = 5421^2 + 11643^2 .

It is a super-2 number, since 2×164946690² = 54414821083912200, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 18661 + ... + 26040.

Almost surely, 2^164946690 is an apocalyptic number.

164946690 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

164946690 is an abundant number, since it is smaller than the sum of its proper divisors (274384566).

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

164946690 is a wasteful number, since it uses less digits than its factorization.

164946690 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 44755 (or 44752 counting only the distinct ones).

The product of its (nonzero) digits is 279936, while the sum is 45.

The square root of 164946690 is about 12843.1573220918. The cubic root of 164946690 is about 548.4215791760.

The spelling of 164946690 in words is "one hundred sixty-four million, nine hundred forty-six thousand, six hundred ninety".