165145661506646 has 8 divisors (see below), whose sum is σ = 247721664265344. Its totient is φ = 82571773418200.

The previous prime is 165145661506613. The next prime is 165145661506663. The reversal of 165145661506646 is 646605166541561.

It is a happy number.

165145661506646 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 528472310 + ... + 528784713.

It is an arithmetic number, because the mean of its divisors is an integer number (30965208033168).

Almost surely, 2^{165145661506646} is an apocalyptic number.

165145661506646 is a deficient number, since it is larger than the sum of its proper divisors (82576002758698).

165145661506646 is a wasteful number, since it uses less digits than its factorization.

165145661506646 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1057335126.

The product of its (nonzero) digits is 93312000, while the sum is 62.

The spelling of 165145661506646 in words is "one hundred sixty-five trillion, one hundred forty-five billion, six hundred sixty-one million, five hundred six thousand, six hundred forty-six".