165561151060501 has 8 divisors (see below), whose sum is σ = 200342905485120. Its totient is φ = 133561936989888.

The previous prime is 165561151060489. The next prime is 165561151060523. The reversal of 165561151060501 is 105060151165561.

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 165561151060501 - 2¹⁷ = 165561150929429 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (165561151064501) 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, 695635088371 + ... + 695635088608.

It is an arithmetic number, because the mean of its divisors is an integer number (25042863185640).

Almost surely, 2^{165561151060501} is an apocalyptic number.

It is an amenable number.

165561151060501 is a deficient number, since it is larger than the sum of its proper divisors (34781754424619).

165561151060501 is a wasteful number, since it uses less digits than its factorization.

165561151060501 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1391270177003.

The product of its (nonzero) digits is 135000, while the sum is 43.

The spelling of 165561151060501 in words is "one hundred sixty-five trillion, five hundred sixty-one billion, one hundred fifty-one million, sixty thousand, five hundred one".