165516005511 has 24 divisors (see below), whose sum is σ = 241932366000. Its totient is φ = 109028633472.

The previous prime is 165516005507. The next prime is 165516005519. The reversal of 165516005511 is 115500615561.

It is a happy number.

It is not a de Polignac number, because 165516005511 - 2² = 165516005507 is a prime.

It is a super-2 number, since 2×165516005511² (a number of 23 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (165516005519) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 1097845 + ... + 1239473.

It is an arithmetic number, because the mean of its divisors is an integer number (10080515250).

Almost surely, 2^165516005511 is an apocalyptic number.

165516005511 is a deficient number, since it is larger than the sum of its proper divisors (76416360489).

165516005511 is a wasteful number, since it uses less digits than its factorization.

165516005511 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 143183 (or 143180 counting only the distinct ones).

The product of its (nonzero) digits is 22500, while the sum is 36.

The spelling of 165516005511 in words is "one hundred sixty-five billion, five hundred sixteen million, five thousand, five hundred eleven".