1646164632 has 64 divisors (see below), whose sum is σ = 4830462720. Its totient is φ = 457619328.

The previous prime is 1646164627. The next prime is 1646164651. The reversal of 1646164632 is 2364616461.

It is a nude number because it is divisible by every one of its digits.

It is a congruent number.

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, 126198 + ... + 138629.

It is an arithmetic number, because the mean of its divisors is an integer number (75475980).

Almost surely, 2^1646164632 is an apocalyptic number.

1646164632 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

1646164632 is an abundant number, since it is smaller than the sum of its proper divisors (3184298088).

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

1646164632 is a wasteful number, since it uses less digits than its factorization.

1646164632 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 264880 (or 264876 counting only the distinct ones).

The product of its digits is 124416, while the sum is 39.

The square root of 1646164632 is about 40572.9544401193. The cubic root of 1646164632 is about 1180.7494597330.

The spelling of 1646164632 in words is "one billion, six hundred forty-six million, one hundred sixty-four thousand, six hundred thirty-two".