64985902811 has 2 divisors, whose sum is σ = 64985902812. Its totient is φ = 64985902810.

The previous prime is 64985902783. The next prime is 64985902847. The reversal of 64985902811 is 11820958946.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 64985902811 - 2²² = 64981708507 is a prime.

It is a super-3 number, since 3×64985902811³ (a number of 33 digits) contains 333 as substring.

It is not a weakly prime, because it can be changed into another prime (64985902211) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 32492951405 + 32492951406.

It is an arithmetic number, because the mean of its divisors is an integer number (32492951406).

Almost surely, 2^64985902811 is an apocalyptic number.

64985902811 is a deficient number, since it is larger than the sum of its proper divisors (1).

64985902811 is an equidigital number, since it uses as much as digits as its factorization.

64985902811 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1244160, while the sum is 53.

The spelling of 64985902811 in words is "sixty-four billion, nine hundred eighty-five million, nine hundred two thousand, eight hundred eleven".