65318838784 has 20 divisors (see below), whose sum is σ = 130510102734. Its totient is φ = 32659419136.

The previous prime is 65318838737. The next prime is 65318838787. The reversal of 65318838784 is 48783881356.

It can be written as a sum of positive squares in only one way, i.e., 45741232384 + 19577606400 = 213872^2 + 139920^2 .

It is not an unprimeable number, because it can be changed into a prime (65318838787) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 63787417 + ... + 63788440.

Almost surely, 2^65318838784 is an apocalyptic number.

65318838784 is a gapful number since it is divisible by the number (64) formed by its first and last digit.

It is an amenable number.

65318838784 is a deficient number, since it is larger than the sum of its proper divisors (65191263950).

65318838784 is an equidigital number, since it uses as much as digits as its factorization.

65318838784 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 127575875 (or 127575859 counting only the distinct ones).

The product of its digits is 30965760, while the sum is 61.

The spelling of 65318838784 in words is "sixty-five billion, three hundred eighteen million, eight hundred thirty-eight thousand, seven hundred eighty-four".