64854243856111 has 2 divisors, whose sum is σ = 64854243856112. Its totient is φ = 64854243856110.

The previous prime is 64854243856021. The next prime is 64854243856139. The reversal of 64854243856111 is 11165834245846.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 64854243856111 - 2⁷ = 64854243855983 is a prime.

It is a super-2 number, since 2×64854243856111² (a number of 28 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (64854243886111) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 32427121928055 + 32427121928056.

It is an arithmetic number, because the mean of its divisors is an integer number (32427121928056).

Almost surely, 2^{64854243856111} is an apocalyptic number.

64854243856111 is a deficient number, since it is larger than the sum of its proper divisors (1).

64854243856111 is an equidigital number, since it uses as much as digits as its factorization.

64854243856111 is an evil number, because the sum of its binary digits is even.

The product of its digits is 22118400, while the sum is 58.

The spelling of 64854243856111 in words is "sixty-four trillion, eight hundred fifty-four billion, two hundred forty-three million, eight hundred fifty-six thousand, one hundred eleven".