64985902847 has 2 divisors, whose sum is σ = 64985902848. Its totient is φ = 64985902846.

The previous prime is 64985902811. The next prime is 64985902913. The reversal of 64985902847 is 74820958946.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 64985902847 - 2⁶ = 64985902783 is a prime.

It is a super-3 number, since 3×64985902847³ (a number of 33 digits) contains 333 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 64985902847.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (64985902447) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 32492951423 + 32492951424.

It is an arithmetic number, because the mean of its divisors is an integer number (32492951424).

Almost surely, 2^64985902847 is an apocalyptic number.

64985902847 is a deficient number, since it is larger than the sum of its proper divisors (1).

64985902847 is an equidigital number, since it uses as much as digits as its factorization.

64985902847 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 34836480, while the sum is 62.

The spelling of 64985902847 in words is "sixty-four billion, nine hundred eighty-five million, nine hundred two thousand, eight hundred forty-seven".