1611988049 has 4 divisors (see below), whose sum is σ = 1842272064. Its totient is φ = 1381704036.

The previous prime is 1611988043. The next prime is 1611988099. The reversal of 1611988049 is 9408891161.

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 1611988049 - 2²⁸ = 1343552593 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1611987994 and 1611988012.

It is not an unprimeable number, because it can be changed into a prime (1611988043) 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, 115141997 + ... + 115142010.

It is an arithmetic number, because the mean of its divisors is an integer number (460568016).

Almost surely, 2^1611988049 is an apocalyptic number.

It is an amenable number.

1611988049 is a deficient number, since it is larger than the sum of its proper divisors (230284015).

1611988049 is an equidigital number, since it uses as much as digits as its factorization.

1611988049 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 230284014.

The product of its (nonzero) digits is 124416, while the sum is 47.

The square root of 1611988049 is about 40149.5709690652. The cubic root of 1611988049 is about 1172.5209356709.

The spelling of 1611988049 in words is "one billion, six hundred eleven million, nine hundred eighty-eight thousand, forty-nine".