2678964565 has 8 divisors (see below), whose sum is σ = 3383955360. Its totient is φ = 2030373072.

The previous prime is 2678964557. The next prime is 2678964569. The reversal of 2678964565 is 5654698762.

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 2678964565 - 2³ = 2678964557 is a prime.

It is a super-2 number, since 2×2678964565² = 14353702281051278450, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2678964569) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 14099719 + ... + 14099908.

It is an arithmetic number, because the mean of its divisors is an integer number (422994420).

Almost surely, 2^2678964565 is an apocalyptic number.

It is an amenable number.

2678964565 is a deficient number, since it is larger than the sum of its proper divisors (704990795).

2678964565 is a wasteful number, since it uses less digits than its factorization.

2678964565 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 28199651.

The product of its digits is 21772800, while the sum is 58.

The square root of 2678964565 is about 51758.7148700584. The cubic root of 2678964565 is about 1388.8510017244.

The spelling of 2678964565 in words is "two billion, six hundred seventy-eight million, nine hundred sixty-four thousand, five hundred sixty-five".