1616811841 has 4 divisors (see below), whose sum is σ = 1687108032. Its totient is φ = 1546515652.

The previous prime is 1616811827. The next prime is 1616811853. The reversal of 1616811841 is 1481186161.

It is the 16416-th star number.

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 not a de Polignac number, because 1616811841 - 2²³ = 1608423233 is a prime.

It is a super-2 number, since 2×1616811841² = 5228161058395618562, which contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 1616811841.

It is not an unprimeable number, because it can be changed into a prime (1616811871) 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, 35148061 + ... + 35148106.

It is an arithmetic number, because the mean of its divisors is an integer number (421777008).

Almost surely, 2^1616811841 is an apocalyptic number.

It is an amenable number.

1616811841 is a deficient number, since it is larger than the sum of its proper divisors (70296191).

1616811841 is an equidigital number, since it uses as much as digits as its factorization.

1616811841 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 70296190.

The product of its digits is 9216, while the sum is 37.

The square root of 1616811841 is about 40209.5988664398. The cubic root of 1616811841 is about 1173.6893406750.

The spelling of 1616811841 in words is "one billion, six hundred sixteen million, eight hundred eleven thousand, eight hundred forty-one".