64854243856134 has 96 divisors (see below), whose sum is σ = 149327694996480. Its totient is φ = 20284515118656.

The previous prime is 64854243856111. The next prime is 64854243856139. The reversal of 64854243856134 is 43165834245846.

64854243856134 is a `hidden beast` number, since 6 + 4 + 8 + 5 + 4 + 2 + 4 + 3 + 8 + 5 + 613 + 4 = 666.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (64854243856139) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 171913164 + ... + 172290000.

It is an arithmetic number, because the mean of its divisors is an integer number (1555496822880).

Almost surely, 2^{64854243856134} is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 64854243856134, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (74663847498240).

64854243856134 is an abundant number, since it is smaller than the sum of its proper divisors (84473451140346).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

64854243856134 is a wasteful number, since it uses less digits than its factorization.

64854243856134 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 381674 (or 381671 counting only the distinct ones).

The product of its digits is 265420800, while the sum is 63.

The spelling of 64854243856134 in words is "sixty-four trillion, eight hundred fifty-four billion, two hundred forty-three million, eight hundred fifty-six thousand, one hundred thirty-four".