1664146605180 has 48 divisors (see below), whose sum is σ = 4725238823424. Its totient is φ = 437522111040.

The previous prime is 1664146605131. The next prime is 1664146605181. The reversal of 1664146605180 is 815066414661.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1664146605181) 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, 195318112 + ... + 195326631.

It is an arithmetic number, because the mean of its divisors is an integer number (98442475488).

Almost surely, 2^{1664146605180} is an apocalyptic number.

1664146605180 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1664146605180 is an abundant number, since it is smaller than the sum of its proper divisors (3061092218244).

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

1664146605180 is a wasteful number, since it uses less digits than its factorization.

1664146605180 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 390644826 (or 390644824 counting only the distinct ones).

The product of its (nonzero) digits is 829440, while the sum is 48.

The spelling of 1664146605180 in words is "one trillion, six hundred sixty-four billion, one hundred forty-six million, six hundred five thousand, one hundred eighty".