2989661608 has 16 divisors (see below), whose sum is σ = 5606388180. Its totient is φ = 1494624768.

The previous prime is 2989661569. The next prime is 2989661611. The reversal of 2989661608 is 8061669892.

It can be written as a sum of positive squares in 2 ways, for example, as 2729226564 + 260435044 = 52242^2 + 16138^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 48510 + ... + 91282.

Almost surely, 2^2989661608 is an apocalyptic number.

It is an amenable number.

2989661608 is a deficient number, since it is larger than the sum of its proper divisors (2616726572).

2989661608 is a wasteful number, since it uses less digits than its factorization.

2989661608 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 51516 (or 51512 counting only the distinct ones).

The product of its (nonzero) digits is 2239488, while the sum is 55.

The square root of 2989661608 is about 54677.7981268449. The cubic root of 2989661608 is about 1440.5909367321.

The spelling of 2989661608 in words is "two billion, nine hundred eighty-nine million, six hundred sixty-one thousand, six hundred eight".