164453990 has 8 divisors (see below), whose sum is σ = 296017200. Its totient is φ = 65781592.

The previous prime is 164453981. The next prime is 164454013. The reversal of 164453990 is 99354461.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a super-2 number, since 2×164453990² = 54090229653840200, which contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 8222690 + ... + 8222709.

It is an arithmetic number, because the mean of its divisors is an integer number (37002150).

Almost surely, 2^164453990 is an apocalyptic number.

164453990 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

164453990 is a deficient number, since it is larger than the sum of its proper divisors (131563210).

164453990 is a wasteful number, since it uses less digits than its factorization.

164453990 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16445406.

The product of its (nonzero) digits is 116640, while the sum is 41.

The square root of 164453990 is about 12823.9615563990. The cubic root of 164453990 is about 547.8749848023.

The spelling of 164453990 in words is "one hundred sixty-four million, four hundred fifty-three thousand, nine hundred ninety".