1661632232 has 32 divisors (see below), whose sum is σ = 3531813600. Its totient is φ = 726542784.

The previous prime is 1661632199. The next prime is 1661632243. The reversal of 1661632232 is 2322361661.

It is a super-2 number, since 2×1661632232² = 5522043348842603648, which contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 418478 + ... + 422429.

It is an arithmetic number, because the mean of its divisors is an integer number (110369175).

Almost surely, 2^1661632232 is an apocalyptic number.

It is an amenable number.

1661632232 is an abundant number, since it is smaller than the sum of its proper divisors (1870181368).

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

1661632232 is a wasteful number, since it uses less digits than its factorization.

1661632232 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 840945 (or 840941 counting only the distinct ones).

The product of its digits is 15552, while the sum is 32.

The square root of 1661632232 is about 40763.1234328284. The cubic root of 1661632232 is about 1184.4361009935.

Adding to 1661632232 its reverse (2322361661), we get a palindrome (3983993893).

The spelling of 1661632232 in words is "one billion, six hundred sixty-one million, six hundred thirty-two thousand, two hundred thirty-two".