155506066516165 has 8 divisors (see below), whose sum is σ = 187724688681600. Its totient is φ = 123659913971472.

The previous prime is 155506066516159. The next prime is 155506066516181. The reversal of 155506066516165 is 561615660605551.

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 155506066516165 - 2¹³ = 155506066507973 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 93117404265 + ... + 93117405934.

It is an arithmetic number, because the mean of its divisors is an integer number (23465586085200).

Almost surely, 2^{155506066516165} is an apocalyptic number.

It is an amenable number.

155506066516165 is a deficient number, since it is larger than the sum of its proper divisors (32218622165435).

155506066516165 is a wasteful number, since it uses less digits than its factorization.

155506066516165 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 186234810371.

The product of its (nonzero) digits is 24300000, while the sum is 58.

The spelling of 155506066516165 in words is "one hundred fifty-five trillion, five hundred six billion, sixty-six million, five hundred sixteen thousand, one hundred sixty-five".