1645164232 has 16 divisors (see below), whose sum is σ = 3116485260. Its totient is φ = 814101504.

The previous prime is 1645164197. The next prime is 1645164233. The reversal of 1645164232 is 2324615461.

It can be written as a sum of positive squares in 2 ways, for example, as 1441417156 + 203747076 = 37966^2 + 14274^2 .

It is not an unprimeable number, because it can be changed into a prime (1645164233) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1059253 + ... + 1060804.

Almost surely, 2^1645164232 is an apocalyptic number.

It is an amenable number.

1645164232 is a deficient number, since it is larger than the sum of its proper divisors (1471321028).

1645164232 is a wasteful number, since it uses less digits than its factorization.

1645164232 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2120160 (or 2120156 counting only the distinct ones).

The product of its digits is 34560, while the sum is 34.

The square root of 1645164232 is about 40560.6241569333. The cubic root of 1645164232 is about 1180.5102246246.

Adding to 1645164232 its reverse (2324615461), we get a palindrome (3969779693).

The spelling of 1645164232 in words is "one billion, six hundred forty-five million, one hundred sixty-four thousand, two hundred thirty-two".