165561502015463 has 4 divisors (see below), whose sum is σ = 165561537085008. Its totient is φ = 165561466945920.

The previous prime is 165561502015421. The next prime is 165561502015523. The reversal of 165561502015463 is 364510205165561.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 165561502015463 - 2⁴⁴ = 147969315971047 is a prime.

It is a super-2 number, since 2×165561502015463² (a number of 29 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (165561502315463) 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, 9101306 + ... + 20345927.

It is an arithmetic number, because the mean of its divisors is an integer number (41390384271252).

Almost surely, 2^{165561502015463} is an apocalyptic number.

165561502015463 is a deficient number, since it is larger than the sum of its proper divisors (35069545).

165561502015463 is an equidigital number, since it uses as much as digits as its factorization.

165561502015463 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 35069544.

The product of its (nonzero) digits is 3240000, while the sum is 50.

The spelling of 165561502015463 in words is "one hundred sixty-five trillion, five hundred sixty-one billion, five hundred two million, fifteen thousand, four hundred sixty-three".