165142378577 has 8 divisors (see below), whose sum is σ = 180194013120. Its totient is φ = 150097192560.

The previous prime is 165142378547. The next prime is 165142378589. The reversal of 165142378577 is 775873241561.

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

It is a cyclic number.

It is not a de Polignac number, because 165142378577 - 2⁸ = 165142378321 is a prime.

It is not an unprimeable number, because it can be changed into a prime (165142378517) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1558502 + ... + 1661087.

It is an arithmetic number, because the mean of its divisors is an integer number (22524251640).

Almost surely, 2^165142378577 is an apocalyptic number.

It is an amenable number.

165142378577 is a deficient number, since it is larger than the sum of its proper divisors (15051634543).

165142378577 is a wasteful number, since it uses less digits than its factorization.

165142378577 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3224263.

The product of its digits is 9878400, while the sum is 56.

The spelling of 165142378577 in words is "one hundred sixty-five billion, one hundred forty-two million, three hundred seventy-eight thousand, five hundred seventy-seven".