1616111473 has 4 divisors (see below), whose sum is σ = 1655528868. Its totient is φ = 1576694080.

The previous prime is 1616111467. The next prime is 1616111479. The reversal of 1616111473 is 3741116161.

It is a semiprime because it is the product of two primes.

It is an interprime number because it is at equal distance from previous prime (1616111467) and next prime (1616111479).

It can be written as a sum of positive squares in 2 ways, for example, as 383258929 + 1232852544 = 19577^2 + 35112^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1616111473 is a prime.

It is a super-2 number, since 2×1616111473² = 5223632586324459458, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1616111479) 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, 19708636 + ... + 19708717.

It is an arithmetic number, because the mean of its divisors is an integer number (413882217).

Almost surely, 2^1616111473 is an apocalyptic number.

It is an amenable number.

1616111473 is a deficient number, since it is larger than the sum of its proper divisors (39417395).

1616111473 is an equidigital number, since it uses as much as digits as its factorization.

1616111473 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 39417394.

The product of its digits is 3024, while the sum is 31.

The square root of 1616111473 is about 40200.8889578328. Note that the first 3 decimals coincide. The cubic root of 1616111473 is about 1173.5198439002.

The spelling of 1616111473 in words is "one billion, six hundred sixteen million, one hundred eleven thousand, four hundred seventy-three".