1664453232 has 80 divisors (see below), whose sum is σ = 5145122080. Its totient is φ = 512137728.

The previous prime is 1664453227. The next prime is 1664453233. The reversal of 1664453232 is 2323544661.

1664453232 is a `hidden beast` number, since 1 + 6 + 644 + 5 + 3 + 2 + 3 + 2 = 666.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1664453233) 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, 142573 + ... + 153804.

It is an arithmetic number, because the mean of its divisors is an integer number (64314026).

Almost surely, 2^1664453232 is an apocalyptic number.

1664453232 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

1664453232 is an abundant number, since it is smaller than the sum of its proper divisors (3480668848).

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

1664453232 is a wasteful number, since it uses less digits than its factorization.

1664453232 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 296407 (or 296395 counting only the distinct ones).

The product of its digits is 103680, while the sum is 36.

The square root of 1664453232 is about 40797.7111122671. The cubic root of 1664453232 is about 1185.1060055786.

Adding to 1664453232 its reverse (2323544661), we get a palindrome (3987997893).

The spelling of 1664453232 in words is "one billion, six hundred sixty-four million, four hundred fifty-three thousand, two hundred thirty-two".