645760132 has 12 divisors (see below), whose sum is σ = 1166534656. Its totient is φ = 312464520.

The previous prime is 645760103. The next prime is 645760151. The reversal of 645760132 is 231067546.

It is a happy number.

It is a super-2 number, since 2×645760132² = 834012296161314848, which contains 22 as substring.

It is a hoax number, since the sum of its digits (34) coincides with the sum of the digits of its distinct prime factors.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2603748 + ... + 2603995.

Almost surely, 2^645760132 is an apocalyptic number.

645760132 is a gapful number since it is divisible by the number (62) formed by its first and last digit.

It is an amenable number.

645760132 is a deficient number, since it is larger than the sum of its proper divisors (520774524).

645760132 is a wasteful number, since it uses less digits than its factorization.

645760132 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5207778 (or 5207776 counting only the distinct ones).

The product of its (nonzero) digits is 30240, while the sum is 34.

The square root of 645760132 is about 25411.8108760474. The cubic root of 645760132 is about 864.3515391187.

The spelling of 645760132 in words is "six hundred forty-five million, seven hundred sixty thousand, one hundred thirty-two".