2564718494 has 8 divisors (see below), whose sum is σ = 4143006840. Its totient is φ = 1183716216.

The previous prime is 2564718493. The next prime is 2564718503. The reversal of 2564718494 is 4948174652.

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

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2564718491) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 49321484 + ... + 49321535.

It is an arithmetic number, because the mean of its divisors is an integer number (517875855).

Almost surely, 2^2564718494 is an apocalyptic number.

2564718494 is a deficient number, since it is larger than the sum of its proper divisors (1578288346).

2564718494 is a wasteful number, since it uses less digits than its factorization.

2564718494 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 98643034.

The product of its digits is 1935360, while the sum is 50.

The square root of 2564718494 is about 50643.0498094260. The cubic root of 2564718494 is about 1368.8207114168.

The spelling of 2564718494 in words is "two billion, five hundred sixty-four million, seven hundred eighteen thousand, four hundred ninety-four".