64673280000 has 780 divisors, whose sum is σ = 267452925168. Its totient is φ = 14745600000.

The previous prime is 64673279999. The next prime is 64673280029. The reversal of 64673280000 is 8237646.

64673280000 is a `hidden beast` number, since 646 + 7 + 3 + 2 + 8 + 0 + 0 + 0 + 0 = 666.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 59 ways as a sum of consecutive naturals, for example, 161279800 + ... + 161280200.

Almost surely, 2^64673280000 is an apocalyptic number.

64673280000 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 64673280000, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (133726462584).

64673280000 is an abundant number, since it is smaller than the sum of its proper divisors (202779645168).

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

64673280000 is an equidigital number, since it uses as much as digits as its factorization.

64673280000 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 458 (or 418 counting only the distinct ones).

The product of its (nonzero) digits is 48384, while the sum is 36.

The spelling of 64673280000 in words is "sixty-four billion, six hundred seventy-three million, two hundred eighty thousand".