1806165659713 has 4 divisors (see below), whose sum is σ = 1806315300288. Its totient is φ = 1806016019140.

The previous prime is 1806165659591. The next prime is 1806165659741. The reversal of 1806165659713 is 3179565616081.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1806165659713 is a prime.

It is a super-2 number, since 2×1806165659713² (a number of 25 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1806165659743) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 74802181 + ... + 74826322.

It is an arithmetic number, because the mean of its divisors is an integer number (451578825072).

Almost surely, 2^{1806165659713} is an apocalyptic number.

It is an amenable number.

1806165659713 is a deficient number, since it is larger than the sum of its proper divisors (149640575).

1806165659713 is a wasteful number, since it uses less digits than its factorization.

1806165659713 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 149640574.

The product of its (nonzero) digits is 8164800, while the sum is 58.

The spelling of 1806165659713 in words is "one trillion, eight hundred six billion, one hundred sixty-five million, six hundred fifty-nine thousand, seven hundred thirteen".