1611216059 has 4 divisors (see below), whose sum is σ = 1641616416. Its totient is φ = 1580815704.

The previous prime is 1611215939. The next prime is 1611216121. The reversal of 1611216059 is 9506121161.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 9506121161 = 4051 ⋅2346611.

It is a cyclic number.

It is not a de Polignac number, because 1611216059 - 2¹² = 1611211963 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1611216559) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 15200099 + ... + 15200204.

It is an arithmetic number, because the mean of its divisors is an integer number (410404104).

Almost surely, 2^1611216059 is an apocalyptic number.

1611216059 is a deficient number, since it is larger than the sum of its proper divisors (30400357).

1611216059 is an equidigital number, since it uses as much as digits as its factorization.

1611216059 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 30400356.

The product of its (nonzero) digits is 3240, while the sum is 32.

The square root of 1611216059 is about 40139.9558918542. The cubic root of 1611216059 is about 1172.3337301942. Note that the first 3 decimals are identical.

The spelling of 1611216059 in words is "one billion, six hundred eleven million, two hundred sixteen thousand, fifty-nine".