165642554073 has 16 divisors (see below), whose sum is σ = 222379278336. Its totient is φ = 109669007760.

The previous prime is 165642554053. The next prime is 165642554081. The reversal of 165642554073 is 370455246561.

It is not a de Polignac number, because 165642554073 - 2⁹ = 165642553561 is a prime.

It is not an unprimeable number, because it can be changed into a prime (165642554023) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 109690 + ... + 585932.

It is an arithmetic number, because the mean of its divisors is an integer number (13898704896).

Almost surely, 2^165642554073 is an apocalyptic number.

It is an amenable number.

165642554073 is a deficient number, since it is larger than the sum of its proper divisors (56736724263).

165642554073 is a wasteful number, since it uses less digits than its factorization.

165642554073 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 477044.

The product of its (nonzero) digits is 3024000, while the sum is 48.

The spelling of 165642554073 in words is "one hundred sixty-five billion, six hundred forty-two million, five hundred fifty-four thousand, seventy-three".