165611043 has 18 divisors (see below), whose sum is σ = 259035036. Its totient is φ = 101913552.

The previous prime is 165611029. The next prime is 165611051. The reversal of 165611043 is 340116561.

165611043 is a `hidden beast` number, since 1 + 6 + 5 + 611 + 0 + 43 = 666.

165611043 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 165611043 - 2⁴ = 165611027 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 165610998 and 165611016.

It is not an unprimeable number, because it can be changed into a prime (165611843) by changing a digit.

It is a polite number, since it can be written in 17 ways as a sum of consecutive naturals, for example, 52921 + ... + 55962.

Almost surely, 2^165611043 is an apocalyptic number.

165611043 is a gapful number since it is divisible by the number (13) formed by its first and last digit.

165611043 is a deficient number, since it is larger than the sum of its proper divisors (93423993).

165611043 is a wasteful number, since it uses less digits than its factorization.

165611043 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 108915 (or 108899 counting only the distinct ones).

The product of its (nonzero) digits is 2160, while the sum is 27.

The square root of 165611043 is about 12868.9954153384. The cubic root of 165611043 is about 549.1568823152.

The spelling of 165611043 in words is "one hundred sixty-five million, six hundred eleven thousand, forty-three".