65032740864 has 672 divisors, whose sum is σ = 240444771840. Its totient is φ = 17103716352.

The previous prime is 65032740859. The next prime is 65032740919. The reversal of 65032740864 is 46804723056.

65032740864 is a `hidden beast` number, since 6 + 503 + 27 + 40 + 86 + 4 = 666.

It is a tau number, because it is divible by the number of its divisors (672).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 181149517 + ... + 181149875.

It is an arithmetic number, because the mean of its divisors is an integer number (357804720).

Almost surely, 2^65032740864 is an apocalyptic number.

65032740864 is a gapful number since it is divisible by the number (64) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 65032740864, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (120222385920).

65032740864 is an abundant number, since it is smaller than the sum of its proper divisors (175412030976).

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

65032740864 is an equidigital number, since it uses as much as digits as its factorization.

65032740864 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 420 (or 384 counting only the distinct ones).

The product of its (nonzero) digits is 967680, while the sum is 45.

The spelling of 65032740864 in words is "sixty-five billion, thirty-two million, seven hundred forty thousand, eight hundred sixty-four".