132640656 has 20 divisors (see below), whose sum is σ = 342655152. Its totient is φ = 44213536.

The previous prime is 132640639. The next prime is 132640667. The reversal of 132640656 is 656046231.

It is a super-2 number, since 2×132640656² = 35187087248220672, which contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1381626 + ... + 1381721.

Almost surely, 2^132640656 is an apocalyptic number.

132640656 is a gapful number since it is divisible by the number (16) formed by its first and last digit.

It is an amenable number.

132640656 is an abundant number, since it is smaller than the sum of its proper divisors (210014496).

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

132640656 is a wasteful number, since it uses less digits than its factorization.

132640656 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2763358 (or 2763352 counting only the distinct ones).

The product of its (nonzero) digits is 25920, while the sum is 33.

The square root of 132640656 is about 11516.9725188523. The cubic root of 132640656 is about 509.9867432156.

Adding to 132640656 its reverse (656046231), we get a palindrome (788686887).

The spelling of 132640656 in words is "one hundred thirty-two million, six hundred forty thousand, six hundred fifty-six".