64980518400 has 720 divisors, whose sum is σ = 270329730528. Its totient is φ = 14598144000.

The previous prime is 64980518371. The next prime is 64980518411. The reversal of 64980518400 is 481508946.

64980518400 is a `hidden beast` number, since 6 + 4 + 98 + 0 + 518 + 40 + 0 = 666.

It is a tau number, because it is divible by the number of its divisors (720).

It is a Harshad number since it is a multiple of its sum of digits (45).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 71 ways as a sum of consecutive naturals, for example, 49189740 + ... + 49191060.

Almost surely, 2^64980518400 is an apocalyptic number.

64980518400 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 64980518400, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (135164865264).

64980518400 is an abundant number, since it is smaller than the sum of its proper divisors (205349212128).

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

64980518400 is a wasteful number, since it uses less digits than its factorization.

64980518400 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1423 (or 1399 counting only the distinct ones).

The product of its (nonzero) digits is 276480, while the sum is 45.

The spelling of 64980518400 in words is "sixty-four billion, nine hundred eighty million, five hundred eighteen thousand, four hundred".