164491786500 has 48 divisors (see below), whose sum is σ = 479000086656. Its totient is φ = 43864476000.

The previous prime is 164491786451. The next prime is 164491786519. The reversal of 164491786500 is 5687194461.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 54829096 + ... + 54832095.

It is an arithmetic number, because the mean of its divisors is an integer number (9979168472).

Almost surely, 2^164491786500 is an apocalyptic number.

164491786500 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

164491786500 is an abundant number, since it is smaller than the sum of its proper divisors (314508300156).

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

164491786500 is a wasteful number, since it uses less digits than its factorization.

164491786500 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 109661213 (or 109661201 counting only the distinct ones).

The product of its (nonzero) digits is 1451520, while the sum is 51.

The spelling of 164491786500 in words is "one hundred sixty-four billion, four hundred ninety-one million, seven hundred eighty-six thousand, five hundred".