164537690 has 16 divisors (see below), whose sum is σ = 296352000. Its totient is φ = 65774160.

The previous prime is 164537687. The next prime is 164537717. The reversal of 164537690 is 96735461.

It is a super-2 number, since 2×164537690² = 54145302861072200, which contains 22 as substring.

It is a Curzon number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 15875 + ... + 24105.

It is an arithmetic number, because the mean of its divisors is an integer number (18522000).

Almost surely, 2^164537690 is an apocalyptic number.

164537690 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

164537690 is a deficient number, since it is larger than the sum of its proper divisors (131814310).

164537690 is a wasteful number, since it uses less digits than its factorization.

164537690 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10237.

The product of its (nonzero) digits is 136080, while the sum is 41.

The square root of 164537690 is about 12827.2245634042. The cubic root of 164537690 is about 547.9679172970.

The spelling of 164537690 in words is "one hundred sixty-four million, five hundred thirty-seven thousand, six hundred ninety".