64262185861 has 2 divisors, whose sum is σ = 64262185862. Its totient is φ = 64262185860.

The previous prime is 64262185853. The next prime is 64262185891. The reversal of 64262185861 is 16858126246.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 59543320225 + 4718865636 = 244015^2 + 68694^2 .

It is a cyclic number.

It is not a de Polignac number, because 64262185861 - 2³ = 64262185853 is a prime.

It is a super-2 number, since 2×64262185861² (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 (64262185811) 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, 32131092930 + 32131092931.

It is an arithmetic number, because the mean of its divisors is an integer number (32131092931).

Almost surely, 2^64262185861 is an apocalyptic number.

It is an amenable number.

64262185861 is a deficient number, since it is larger than the sum of its proper divisors (1).

64262185861 is an equidigital number, since it uses as much as digits as its factorization.

64262185861 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1105920, while the sum is 49.

The spelling of 64262185861 in words is "sixty-four billion, two hundred sixty-two million, one hundred eighty-five thousand, eight hundred sixty-one".