1659117611 has 4 divisors (see below), whose sum is σ = 1659241272. Its totient is φ = 1658993952.

The previous prime is 1659117587. The next prime is 1659117623. The reversal of 1659117611 is 1167119561.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 1167119561 = 2819 ⋅414019.

It is a cyclic number.

It is not a de Polignac number, because 1659117611 - 2¹⁸ = 1658855467 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1659117311) 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, 38861 + ... + 69486.

It is an arithmetic number, because the mean of its divisors is an integer number (414810318).

Almost surely, 2^1659117611 is an apocalyptic number.

1659117611 is a deficient number, since it is larger than the sum of its proper divisors (123661).

1659117611 is a wasteful number, since it uses less digits than its factorization.

1659117611 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 123660.

The product of its digits is 11340, while the sum is 38.

The square root of 1659117611 is about 40732.2674424098. The cubic root of 1659117611 is about 1183.8383129569.

The spelling of 1659117611 in words is "one billion, six hundred fifty-nine million, one hundred seventeen thousand, six hundred eleven".