165126015526561 has 8 divisors (see below), whose sum is σ = 166748748468224. Its totient is φ = 163503658887840.

The previous prime is 165126015526559. The next prime is 165126015526601. The reversal of 165126015526561 is 165625510621561.

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 165126015526561 - 2¹ = 165126015526559 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 165126015526499 and 165126015526508.

It is not an unprimeable number, because it can be changed into a prime (165126015521561) 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, 93193761 + ... + 94949086.

It is an arithmetic number, because the mean of its divisors is an integer number (20843593558528).

Almost surely, 2^{165126015526561} is an apocalyptic number.

It is an amenable number.

165126015526561 is a deficient number, since it is larger than the sum of its proper divisors (1622732941663).

165126015526561 is a wasteful number, since it uses less digits than its factorization.

165126015526561 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 188151471.

The product of its (nonzero) digits is 3240000, while the sum is 52.

The spelling of 165126015526561 in words is "one hundred sixty-five trillion, one hundred twenty-six billion, fifteen million, five hundred twenty-six thousand, five hundred sixty-one".