64981147396 has 27 divisors (see below), whose sum is σ = 125005516167. Its totient is φ = 29534336040.

The previous prime is 64981147393. The next prime is 64981147403. The reversal of 64981147396 is 69374118946.

The square root of 64981147396 is 254914.

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

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 64981147396.

It is not an unprimeable number, because it can be changed into a prime (64981147393) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 8 ways as a sum of consecutive naturals, for example, 5602315 + ... + 5613901.

Almost surely, 2^64981147396 is an apocalyptic number.

64981147396 is the 254914-th square number.

It is an amenable number.

64981147396 is a deficient number, since it is larger than the sum of its proper divisors (60024368771).

64981147396 is an equidigital number, since it uses as much as digits as its factorization.

64981147396 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 23200 (or 11600 counting only the distinct ones).

The product of its digits is 7838208, while the sum is 58.

The spelling of 64981147396 in words is "sixty-four billion, nine hundred eighty-one million, one hundred forty-seven thousand, three hundred ninety-six".