64042436385018 has 576 divisors, whose sum is σ = 184353026457600. Its totient is φ = 16298305021440.

The previous prime is 64042436384951. The next prime is 64042436385023. The reversal of 64042436385018 is 81058363424046.

64042436385018 is a `hidden beast` number, since 6 + 4 + 0 + 4 + 243 + 6 + 385 + 0 + 18 = 666.

It is a Harshad number since it is a multiple of its sum of digits (54).

It is an unprimeable number.

It is a polite number, since it can be written in 287 ways as a sum of consecutive naturals, for example, 6398479998 + ... + 6398490006.

It is an arithmetic number, because the mean of its divisors is an integer number (320057337600).

Almost surely, 2^{64042436385018} is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 64042436385018, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (92176513228800).

64042436385018 is an abundant number, since it is smaller than the sum of its proper divisors (120310590072582).

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

64042436385018 is a wasteful number, since it uses less digits than its factorization.

64042436385018 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10449 (or 10424 counting only the distinct ones).

The product of its (nonzero) digits is 13271040, while the sum is 54.

The spelling of 64042436385018 in words is "sixty-four trillion, forty-two billion, four hundred thirty-six million, three hundred eighty-five thousand, eighteen".