2564687216 has 60 divisors (see below), whose sum is σ = 6149441232. Its totient is φ = 1014594048.

The previous prime is 2564687207. The next prime is 2564687221. The reversal of 2564687216 is 6127864652.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 48821 + ... + 86676.

Almost surely, 2^2564687216 is an apocalyptic number.

2564687216 is a gapful number since it is divisible by the number (26) formed by its first and last digit.

It is an amenable number.

2564687216 is an abundant number, since it is smaller than the sum of its proper divisors (3584754016).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

2564687216 is a wasteful number, since it uses less digits than its factorization.

2564687216 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 135538 (or 135519 counting only the distinct ones).

The product of its digits is 967680, while the sum is 47.

The square root of 2564687216 is about 50642.7410000683. The cubic root of 2564687216 is about 1368.8151469142.

The spelling of 2564687216 in words is "two billion, five hundred sixty-four million, six hundred eighty-seven thousand, two hundred sixteen".