164687409136 has 20 divisors (see below), whose sum is σ = 320353105464. Its totient is φ = 82015640000.

The previous prime is 164687409127. The next prime is 164687409193. The reversal of 164687409136 is 631904786461.

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, 20499895 + ... + 20507926.

Almost surely, 2^164687409136 is an apocalyptic number.

164687409136 is a gapful number since it is divisible by the number (16) formed by its first and last digit.

It is an amenable number.

164687409136 is a deficient number, since it is larger than the sum of its proper divisors (155665696328).

164687409136 is a wasteful number, since it uses less digits than its factorization.

164687409136 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 41008080 (or 41008074 counting only the distinct ones).

The product of its (nonzero) digits is 5225472, while the sum is 55.

The spelling of 164687409136 in words is "one hundred sixty-four billion, six hundred eighty-seven million, four hundred nine thousand, one hundred thirty-six".