64788688746 has 36 divisors (see below), whose sum is σ = 149118614502. Its totient is φ = 20325861504.

The previous prime is 64788688721. The next prime is 64788688747.

64788688746 is a `hidden beast` number, since 6 + 478 + 8 + 6 + 88 + 74 + 6 = 666.

64788688746 is nontrivially palindromic in base 10.

It can be written as a sum of positive squares in 3 ways, for example, as 64788066225 + 622521 = 254535^2 + 789^2 .

It is not an unprimeable number, because it can be changed into a prime (64788688747) by changing a digit.

It is a polite number, since it can be written in 17 ways as a sum of consecutive naturals, for example, 6222085 + ... + 6232488.

Almost surely, 2^64788688746 is an apocalyptic number.

64788688746 is an abundant number, since it is smaller than the sum of its proper divisors (84329925756).

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

64788688746 is a wasteful number, since it uses less digits than its factorization.

64788688746 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12454615 (or 12454595 counting only the distinct ones).

The product of its digits is 693633024, while the sum is 72.

The spelling of 64788688746 in words is "sixty-four billion, seven hundred eighty-eight million, six hundred eighty-eight thousand, seven hundred forty-six".