2686638385 has 16 divisors (see below), whose sum is σ = 3248937216. Its totient is φ = 2132709568.

The previous prime is 2686638377. The next prime is 2686638403. The reversal of 2686638385 is 5838366862.

It is a cyclic number.

It is not a de Polignac number, because 2686638385 - 2³ = 2686638377 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 537759 + ... + 542731.

It is an arithmetic number, because the mean of its divisors is an integer number (203058576).

Almost surely, 2^2686638385 is an apocalyptic number.

It is an amenable number.

2686638385 is a deficient number, since it is larger than the sum of its proper divisors (562298831).

2686638385 is a wasteful number, since it uses less digits than its factorization.

2686638385 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5792.

The product of its digits is 9953280, while the sum is 55.

The square root of 2686638385 is about 51832.7925641673. The cubic root of 2686638385 is about 1390.1758459794.

The spelling of 2686638385 in words is "two billion, six hundred eighty-six million, six hundred thirty-eight thousand, three hundred eighty-five".