64934453760 has 480 divisors, whose sum is σ = 236895962688. Its totient is φ = 15046901760.

The previous prime is 64934453729. The next prime is 64934453777. The reversal of 64934453760 is 6735443946.

It is a happy number.

It is a tau number, because it is divible by the number of its divisors (480).

It is a Smith number, since the sum of its digits (51) coincides with the sum of the digits of its prime factors.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 44689194 + ... + 44690646.

Almost surely, 2^64934453760 is an apocalyptic number.

64934453760 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 64934453760, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (118447981344).

64934453760 is an abundant number, since it is smaller than the sum of its proper divisors (171961508928).

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

64934453760 is a wasteful number, since it uses less digits than its factorization.

64934453760 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1536 (or 1497 counting only the distinct ones).

The product of its (nonzero) digits is 6531840, while the sum is 51.

The spelling of 64934453760 in words is "sixty-four billion, nine hundred thirty-four million, four hundred fifty-three thousand, seven hundred sixty".