165565001151 has 48 divisors (see below), whose sum is σ = 274933751040. Its totient is φ = 94953116160.

The previous prime is 165565001141. The next prime is 165565001183. The reversal of 165565001151 is 151100565561.

It is a happy number.

165565001151 is a `hidden beast` number, since 1 + 6 + 556 + 50 + 0 + 1 + 1 + 51 = 666.

It is not a de Polignac number, because 165565001151 - 2¹⁹ = 165564476863 is a prime.

It is a super-2 number, since 2×165565001151² (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 (165565001141) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 1618831 + ... + 1718063.

It is an arithmetic number, because the mean of its divisors is an integer number (5727786480).

Almost surely, 2^165565001151 is an apocalyptic number.

165565001151 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

165565001151 is a deficient number, since it is larger than the sum of its proper divisors (109368749889).

165565001151 is a wasteful number, since it uses less digits than its factorization.

165565001151 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 100156 (or 100153 counting only the distinct ones).

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

The spelling of 165565001151 in words is "one hundred sixty-five billion, five hundred sixty-five million, one thousand, one hundred fifty-one".