64147719076 has 81 divisors (see below), whose sum is σ = 132840423009. Its totient is φ = 27025348896.

The previous prime is 64147719047. The next prime is 64147719137. The reversal of 64147719076 is 67091774146.

The square root of 64147719076 is 253274.

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

It can be written as a sum of positive squares in only one way, i.e., 59744069476 + 4403649600 = 244426^2 + 66360^2 .

It is a super-2 number, since 2×64147719076² (a number of 22 digits) contains 22 as substring.

It is an unprimeable number.

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 26 ways as a sum of consecutive naturals, for example, 280120930 + ... + 280121158.

Almost surely, 2^64147719076 is an apocalyptic number.

64147719076 is the 253274-th square number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 64147719076

64147719076 is an abundant number, since it is smaller than the sum of its proper divisors (68692703933).

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

64147719076 is an equidigital number, since it uses as much as digits as its factorization.

64147719076 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 634 (or 317 counting only the distinct ones).

The product of its (nonzero) digits is 1778112, while the sum is 52.

The spelling of 64147719076 in words is "sixty-four billion, one hundred forty-seven million, seven hundred nineteen thousand, seventy-six".