164944654512 has 80 divisors (see below), whose sum is σ = 492187819392. Its totient is φ = 47043036160.

The previous prime is 164944654487. The next prime is 164944654519. The reversal of 164944654512 is 215456449461.

It is a Harshad number since it is a multiple of its sum of digits (51).

It is not an unprimeable number, because it can be changed into a prime (164944654519) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 9179118 + ... + 9197069.

Almost surely, 2^164944654512 is an apocalyptic number.

164944654512 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

164944654512 is an abundant number, since it is smaller than the sum of its proper divisors (327243164880).

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

164944654512 is a wasteful number, since it uses less digits than its factorization.

164944654512 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18376226 (or 18376220 counting only the distinct ones).

The product of its digits is 4147200, while the sum is 51.

The spelling of 164944654512 in words is "one hundred sixty-four billion, nine hundred forty-four million, six hundred fifty-four thousand, five hundred twelve".