165551100156011 has 4 divisors (see below), whose sum is σ = 165551339557800. Its totient is φ = 165550860754224.

The previous prime is 165551100156007. The next prime is 165551100156031. The reversal of 165551100156011 is 110651001155561.

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 165551100156011 - 2² = 165551100156007 is a prime.

It is a super-3 number, since 3×165551100156011³ (a number of 44 digits) contains 333 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (165551100156031) 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, 118660601 + ... + 120047658.

It is an arithmetic number, because the mean of its divisors is an integer number (41387834889450).

Almost surely, 2^{165551100156011} is an apocalyptic number.

165551100156011 is a deficient number, since it is larger than the sum of its proper divisors (239401789).

165551100156011 is an equidigital number, since it uses as much as digits as its factorization.

165551100156011 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 239401788.

The product of its (nonzero) digits is 22500, while the sum is 38.

The spelling of 165551100156011 in words is "one hundred sixty-five trillion, five hundred fifty-one billion, one hundred million, one hundred fifty-six thousand, eleven".