165324556513555 has 32 divisors (see below), whose sum is σ = 201393929602944. Its totient is φ = 130272010960896.

The previous prime is 165324556513553. The next prime is 165324556513559. The reversal of 165324556513555 is 555315655423561.

It is a cyclic number.

It is not a de Polignac number, because 165324556513555 - 2¹ = 165324556513553 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 165324556513493 and 165324556513502.

It is not an unprimeable number, because it can be changed into a prime (165324556513553) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 88146907 + ... + 90002923.

It is an arithmetic number, because the mean of its divisors is an integer number (6293560300092).

Almost surely, 2^{165324556513555} is an apocalyptic number.

165324556513555 is a deficient number, since it is larger than the sum of its proper divisors (36069373089389).

165324556513555 is a wasteful number, since it uses less digits than its factorization.

165324556513555 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1857055.

The product of its digits is 202500000, while the sum is 61.

The spelling of 165324556513555 in words is "one hundred sixty-five trillion, three hundred twenty-four billion, five hundred fifty-six million, five hundred thirteen thousand, five hundred fifty-five".