165564554 has 8 divisors (see below), whose sum is σ = 249991968. Its totient is φ = 82233900.

The previous prime is 165564551. The next prime is 165564563. The reversal of 165564554 is 455465561.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not an unprimeable number, because it can be changed into a prime (165564551) by changing a digit.

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, 273812 + ... + 274415.

It is an arithmetic number, because the mean of its divisors is an integer number (31248996).

Almost surely, 2^165564554 is an apocalyptic number.

165564554 is a deficient number, since it is larger than the sum of its proper divisors (84427414).

165564554 is a wasteful number, since it uses less digits than its factorization.

165564554 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 548380.

The product of its digits is 360000, while the sum is 41.

The square root of 165564554 is about 12867.1890481177. The cubic root of 165564554 is about 549.1054925386.

The spelling of 165564554 in words is "one hundred sixty-five million, five hundred sixty-four thousand, five hundred fifty-four".