164351185644 has 48 divisors (see below), whose sum is σ = 391240362240. Its totient is φ = 53681951040.

The previous prime is 164351185597. The next prime is 164351185673. The reversal of 164351185644 is 446581153461.

It is a super-2 number, since 2×164351185644² (a number of 23 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 164351185593 and 164351185602.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 153019 + ... + 593394.

It is an arithmetic number, because the mean of its divisors is an integer number (8150840880).

Almost surely, 2^164351185644 is an apocalyptic number.

It is an amenable number.

164351185644 is an abundant number, since it is smaller than the sum of its proper divisors (226889176596).

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

164351185644 is a wasteful number, since it uses less digits than its factorization.

164351185644 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 746790 (or 746788 counting only the distinct ones).

The product of its digits is 1382400, while the sum is 48.

The spelling of 164351185644 in words is "one hundred sixty-four billion, three hundred fifty-one million, one hundred eighty-five thousand, six hundred forty-four".