64582633728 has 54 divisors (see below), whose sum is σ = 186207661094. Its totient is φ = 21527543808.

The previous prime is 64582633669. The next prime is 64582633733. The reversal of 64582633728 is 82733628546.

64582633728 is a `hidden beast` number, since 6 + 4 + 5 + 8 + 263 + 372 + 8 = 666.

It can be written as a sum of positive squares in only one way, i.e., 64134549504 + 448084224 = 253248^2 + 21168^2 .

It is a super-3 number, since 3×64582633728³ (a number of 33 digits) contains 333 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 14013025 + ... + 14017632.

Almost surely, 2^64582633728 is an apocalyptic number.

It is an amenable number.

64582633728 is an abundant number, since it is smaller than the sum of its proper divisors (121625027366).

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

64582633728 is a wasteful number, since it uses less digits than its factorization.

64582633728 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 28030679 (or 28030662 counting only the distinct ones).

The product of its digits is 11612160, while the sum is 54.

The spelling of 64582633728 in words is "sixty-four billion, five hundred eighty-two million, six hundred thirty-three thousand, seven hundred twenty-eight".