18164040650450 has 12 divisors (see below), whose sum is σ = 33785115609930. Its totient is φ = 7265616260160.

The previous prime is 18164040650419. The next prime is 18164040650461. The reversal of 18164040650450 is 5405604046181.

It is a happy number.

It can be written as a sum of positive squares in 3 ways, for example, as 13358155124161 + 4805885526289 = 3654881^2 + 2192233^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 181640406455 + ... + 181640406554.

Almost surely, 2^{18164040650450} is an apocalyptic number.

18164040650450 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

18164040650450 is a deficient number, since it is larger than the sum of its proper divisors (15621074959480).

18164040650450 is a wasteful number, since it uses less digits than its factorization.

18164040650450 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 363280813021 (or 363280813016 counting only the distinct ones).

The product of its (nonzero) digits is 460800, while the sum is 44.

The spelling of 18164040650450 in words is "eighteen trillion, one hundred sixty-four billion, forty million, six hundred fifty thousand, four hundred fifty".