64891105063 has 2 divisors, whose sum is σ = 64891105064. Its totient is φ = 64891105062.

The previous prime is 64891105033. The next prime is 64891105129. The reversal of 64891105063 is 36050119846.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 64891105063 - 2¹³ = 64891096871 is a prime.

It is a super-3 number, since 3×64891105063³ (a number of 33 digits) contains 333 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (64891105033) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 32445552531 + 32445552532.

It is an arithmetic number, because the mean of its divisors is an integer number (32445552532).

Almost surely, 2^64891105063 is an apocalyptic number.

64891105063 is a deficient number, since it is larger than the sum of its proper divisors (1).

64891105063 is an equidigital number, since it uses as much as digits as its factorization.

64891105063 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 155520, while the sum is 43.

The spelling of 64891105063 in words is "sixty-four billion, eight hundred ninety-one million, one hundred five thousand, sixty-three".