64147143517 has 2 divisors, whose sum is σ = 64147143518. Its totient is φ = 64147143516.

The previous prime is 64147143491. The next prime is 64147143553. The reversal of 64147143517 is 71534174146.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 63229114116 + 918029401 = 251454^2 + 30299^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-64147143517 is a prime.

It is a super-2 number, since 2×64147143517² (a number of 22 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (64147143587) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 32073571758 + 32073571759.

It is an arithmetic number, because the mean of its divisors is an integer number (32073571759).

Almost surely, 2^64147143517 is an apocalyptic number.

It is an amenable number.

64147143517 is a deficient number, since it is larger than the sum of its proper divisors (1).

64147143517 is an equidigital number, since it uses as much as digits as its factorization.

64147143517 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 282240, while the sum is 43.

The spelling of 64147143517 in words is "sixty-four billion, one hundred forty-seven million, one hundred forty-three thousand, five hundred seventeen".