165261446001 has 6 divisors (see below), whose sum is σ = 238710977570. Its totient is φ = 110174297328.

The previous prime is 165261445991. The next prime is 165261446011. The reversal of 165261446001 is 100644162561.

165261446001 is a `hidden beast` number, since 1 + 6 + 5 + 2 + 6 + 1 + 44 + 600 + 1 = 666.

It is an interprime number because it is at equal distance from previous prime (165261445991) and next prime (165261446011).

It can be written as a sum of positive squares in only one way, i.e., 92793344400 + 72468101601 = 304620^2 + 269199^2 .

It is a de Polignac number, because none of the positive numbers 2^k-165261446001 is a prime.

It is a super-2 number, since 2×165261446001² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (165261446011) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 9181191436 + ... + 9181191453.

Almost surely, 2^165261446001 is an apocalyptic number.

It is an amenable number.

165261446001 is a deficient number, since it is larger than the sum of its proper divisors (73449531569).

165261446001 is a wasteful number, since it uses less digits than its factorization.

165261446001 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18362382895 (or 18362382892 counting only the distinct ones).

The product of its (nonzero) digits is 34560, while the sum is 36.

The spelling of 165261446001 in words is "one hundred sixty-five billion, two hundred sixty-one million, four hundred forty-six thousand, one".