165656501321132 has 24 divisors (see below), whose sum is σ = 305170871784240. Its totient is φ = 78465228206400.

The previous prime is 165656501321099. The next prime is 165656501321149. The reversal of 165656501321132 is 231123105656561.

It is a super-2 number, since 2×165656501321132² (a number of 29 digits) 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, 48918119 + ... + 52194782.

It is an arithmetic number, because the mean of its divisors is an integer number (12715452991010).

Almost surely, 2^{165656501321132} is an apocalyptic number.

It is an amenable number.

165656501321132 is a deficient number, since it is larger than the sum of its proper divisors (139514370463108).

165656501321132 is a wasteful number, since it uses less digits than its factorization.

165656501321132 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 101134481 (or 101134479 counting only the distinct ones).

The product of its (nonzero) digits is 972000, while the sum is 47.

Adding to 165656501321132 its reverse (231123105656561), we get a palindrome (396779606977693).

The spelling of 165656501321132 in words is "one hundred sixty-five trillion, six hundred fifty-six billion, five hundred one million, three hundred twenty-one thousand, one hundred thirty-two".