1996181664 has 72 divisors (see below), whose sum is σ = 5278367808. Its totient is φ = 660545280.

The previous prime is 1996181659. The next prime is 1996181689. The reversal of 1996181664 is 4661816991.

1996181664 is digitally balanced in base 4, because in such base it contains all the possibile digits an equal number of times.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 7206294 + ... + 7206570.

It is an arithmetic number, because the mean of its divisors is an integer number (73310664).

Almost surely, 2^1996181664 is an apocalyptic number.

It is an amenable number.

1996181664 is an abundant number, since it is smaller than the sum of its proper divisors (3282186144).

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

1996181664 is an equidigital number, since it uses as much as digits as its factorization.

1996181664 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 838 (or 553 counting only the distinct ones).

The product of its digits is 559872, while the sum is 51.

The square root of 1996181664 is about 44678.6488605016. The cubic root of 1996181664 is about 1259.1187387788.

The spelling of 1996181664 in words is "one billion, nine hundred ninety-six million, one hundred eighty-one thousand, six hundred sixty-four".