165605015454061 has 4 divisors (see below), whose sum is σ = 165620628268992. Its totient is φ = 165589402639132.

The previous prime is 165605015454013. The next prime is 165605015454071. The reversal of 165605015454061 is 160454510506561.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 165605015454061 - 2¹³ = 165605015445869 is a prime.

It is a super-2 number, since 2×165605015454061² (a number of 29 digits) contains 22 as substring.

It is a Smith number, since the sum of its digits (49) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 165605015453996 and 165605015454014.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (165605015454071) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 7806391555 + ... + 7806412768.

It is an arithmetic number, because the mean of its divisors is an integer number (41405157067248).

Almost surely, 2^{165605015454061} is an apocalyptic number.

It is an amenable number.

165605015454061 is a deficient number, since it is larger than the sum of its proper divisors (15612814931).

165605015454061 is a wasteful number, since it uses less digits than its factorization.

165605015454061 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15612814930.

The product of its (nonzero) digits is 2160000, while the sum is 49.

The spelling of 165605015454061 in words is "one hundred sixty-five trillion, six hundred five billion, fifteen million, four hundred fifty-four thousand, sixty-one".