64872397824 has 352 divisors, whose sum is σ = 191349236736. Its totient is φ = 19418972160.

The previous prime is 64872397789. The next prime is 64872397829. The reversal of 64872397824 is 42879327846.

It is a happy number.

It is a Smith number, since the sum of its digits (60) coincides with the sum of the digits of its prime factors.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (64872397829) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 388457389 + ... + 388457555.

Almost surely, 2^64872397824 is an apocalyptic number.

64872397824 is a gapful number since it is divisible by the number (64) 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 64872397824, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (95674618368).

64872397824 is an abundant number, since it is smaller than the sum of its proper divisors (126476838912).

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

64872397824 is a wasteful number, since it uses less digits than its factorization.

64872397824 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 411 (or 393 counting only the distinct ones).

The product of its digits is 32514048, while the sum is 60.

The spelling of 64872397824 in words is "sixty-four billion, eight hundred seventy-two million, three hundred ninety-seven thousand, eight hundred twenty-four".