165256427544 has 64 divisors (see below), whose sum is σ = 445090464000. Its totient is φ = 50828781696.

The previous prime is 165256427503. The next prime is 165256427603. The reversal of 165256427544 is 445724652561.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 731407 + ... + 930305.

It is an arithmetic number, because the mean of its divisors is an integer number (6954538500).

Almost surely, 2^165256427544 is an apocalyptic number.

It is an amenable number.

165256427544 is an abundant number, since it is smaller than the sum of its proper divisors (279834036456).

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

165256427544 is a wasteful number, since it uses less digits than its factorization.

165256427544 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 201584 (or 201580 counting only the distinct ones).

The product of its digits is 8064000, while the sum is 51.

The spelling of 165256427544 in words is "one hundred sixty-five billion, two hundred fifty-six million, four hundred twenty-seven thousand, five hundred forty-four".