1616889609 has 12 divisors (see below), whose sum is σ = 2338169652. Its totient is φ = 1076697600.

The previous prime is 1616889553. The next prime is 1616889613. The reversal of 1616889609 is 9069886161.

1616889609 is a `hidden beast` number, since 16 + 16 + 8 + 8 + 9 + 609 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 307897209 + 1308992400 = 17547^2 + 36180^2 .

It is not a de Polignac number, because 1616889609 - 2⁹ = 1616889097 is a prime.

It is a super-2 number, since 2×1616889609² = 5228664015384345762, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (1616889619) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 94032 + ... + 109889.

It is an arithmetic number, because the mean of its divisors is an integer number (194847471).

Almost surely, 2^1616889609 is an apocalyptic number.

It is an amenable number.

1616889609 is a deficient number, since it is larger than the sum of its proper divisors (721280043).

1616889609 is a wasteful number, since it uses less digits than its factorization.

1616889609 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 204808 (or 204805 counting only the distinct ones).

The product of its (nonzero) digits is 1119744, while the sum is 54.

The square root of 1616889609 is about 40210.5658875873. The cubic root of 1616889609 is about 1173.7081583685.

The spelling of 1616889609 in words is "one billion, six hundred sixteen million, eight hundred eighty-nine thousand, six hundred nine".