64034246640 has 480 divisors, whose sum is σ = 259504390656. Its totient is φ = 12922398720.

The previous prime is 64034246623. The next prime is 64034246651. The reversal of 64034246640 is 4664243046.

It is a hoax number, since the sum of its digits (39) coincides with the sum of the digits of its distinct prime factors.

It is a Harshad number since it is a multiple of its sum of digits (39).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 95 ways as a sum of consecutive naturals, for example, 3507135 + ... + 3525345.

Almost surely, 2^64034246640 is an apocalyptic number.

64034246640 is a gapful number since it is divisible by the number (60) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 64034246640, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (129752195328).

64034246640 is an abundant number, since it is smaller than the sum of its proper divisors (195470144016).

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

64034246640 is a wasteful number, since it uses less digits than its factorization.

64034246640 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 18277 (or 18264 counting only the distinct ones).

The product of its (nonzero) digits is 331776, while the sum is 39.

Adding to 64034246640 its reverse (4664243046), we get a palindrome (68698489686).

The spelling of 64034246640 in words is "sixty-four billion, thirty-four million, two hundred forty-six thousand, six hundred forty".