165516515051 has 16 divisors (see below), whose sum is σ = 179887795200. Its totient is φ = 151713453600.

The previous prime is 165516515041. The next prime is 165516515053. The reversal of 165516515051 is 150515615561.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-165516515051 is a prime.

It is a super-3 number, since 3×165516515051³ (a number of 35 digits) contains 333 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (165516515053) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2875865 + ... + 2932853.

It is an arithmetic number, because the mean of its divisors is an integer number (11242987200).

Almost surely, 2^165516515051 is an apocalyptic number.

165516515051 is a deficient number, since it is larger than the sum of its proper divisors (14371280149).

165516515051 is a wasteful number, since it uses less digits than its factorization.

165516515051 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 61970.

The product of its (nonzero) digits is 112500, while the sum is 41.

The spelling of 165516515051 in words is "one hundred sixty-five billion, five hundred sixteen million, five hundred fifteen thousand, fifty-one".