65437732864 has 117 divisors (see below), whose sum is σ = 152491363731. Its totient is φ = 27995627520.

The previous prime is 65437732831. The next prime is 65437732873. The reversal of 65437732864 is 46823773456.

It is a happy number.

The square root of 65437732864 is 255808.

It is a perfect power (a square), and thus also a powerful number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 8 ways as a sum of consecutive naturals, for example, 114601699 + ... + 114602269.

Almost surely, 2^65437732864 is an apocalyptic number.

65437732864 is a gapful number since it is divisible by the number (64) formed by its first and last digit.

65437732864 is the 255808-th square number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 65437732864

65437732864 is an abundant number, since it is smaller than the sum of its proper divisors (87053630867).

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

65437732864 is an frugal number, since it uses more digits than its factorization.

65437732864 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1180 (or 580 counting only the distinct ones).

The product of its digits is 20321280, while the sum is 55.

It can be divided in two parts, 654377 and 32864, that added together give a square (687241 = 829²).

The spelling of 65437732864 in words is "sixty-five billion, four hundred thirty-seven million, seven hundred thirty-two thousand, eight hundred sixty-four".