165221314655032 has 64 divisors (see below), whose sum is σ = 326483096808960. Its totient is φ = 78231202262400.

The previous prime is 165221314654967. The next prime is 165221314655041. The reversal of 165221314655032 is 230556413122561.

It is a Harshad number since it is a multiple of its sum of digits (46).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 71274807 + ... + 73556377.

It is an arithmetic number, because the mean of its divisors is an integer number (5101298387640).

Almost surely, 2^{165221314655032} is an apocalyptic number.

It is an amenable number.

165221314655032 is a deficient number, since it is larger than the sum of its proper divisors (161261782153928).

165221314655032 is a wasteful number, since it uses less digits than its factorization.

165221314655032 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2285524 (or 2285520 counting only the distinct ones).

The product of its (nonzero) digits is 1296000, while the sum is 46.

Adding to 165221314655032 its reverse (230556413122561), we get a palindrome (395777727777593).

The spelling of 165221314655032 in words is "one hundred sixty-five trillion, two hundred twenty-one billion, three hundred fourteen million, six hundred fifty-five thousand, thirty-two".