2689936985 has 8 divisors (see below), whose sum is σ = 3229251840. Its totient is φ = 2151064624.

The previous prime is 2689936919. The next prime is 2689937023. The reversal of 2689936985 is 5896399862.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 2689936985 - 2⁸ = 2689936729 is a prime.

It is a Curzon number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 97097 + ... + 121686.

It is an arithmetic number, because the mean of its divisors is an integer number (403656480).

Almost surely, 2^2689936985 is an apocalyptic number.

It is an amenable number.

2689936985 is a deficient number, since it is larger than the sum of its proper divisors (539314855).

2689936985 is a wasteful number, since it uses less digits than its factorization.

2689936985 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 221247.

The product of its digits is 50388480, while the sum is 65.

The square root of 2689936985 is about 51864.6024278602. The cubic root of 2689936985 is about 1390.7445565081.

The spelling of 2689936985 in words is "two billion, six hundred eighty-nine million, nine hundred thirty-six thousand, nine hundred eighty-five".