64845331511 has 2 divisors, whose sum is σ = 64845331512. Its totient is φ = 64845331510.

The previous prime is 64845331457. The next prime is 64845331517. The reversal of 64845331511 is 11513354846.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-64845331511 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (64845331517) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 32422665755 + 32422665756.

It is an arithmetic number, because the mean of its divisors is an integer number (32422665756).

Almost surely, 2^64845331511 is an apocalyptic number.

64845331511 is a deficient number, since it is larger than the sum of its proper divisors (1).

64845331511 is an equidigital number, since it uses as much as digits as its factorization.

64845331511 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 172800, while the sum is 41.

The spelling of 64845331511 in words is "sixty-four billion, eight hundred forty-five million, three hundred thirty-one thousand, five hundred eleven".