64773734400 has 360 divisors, whose sum is σ = 238016866640. Its totient is φ = 17270046720.

The previous prime is 64773734387. The next prime is 64773734411. The reversal of 64773734400 is 443737746.

It is a tau number, because it is divible by the number of its divisors (360).

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

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 11056272 + ... + 11062128.

Almost surely, 2^64773734400 is an apocalyptic number.

64773734400 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 64773734400, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (119008433320).

64773734400 is an abundant number, since it is smaller than the sum of its proper divisors (173243132240).

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

64773734400 is an equidigital number, since it uses as much as digits as its factorization.

64773734400 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5904 (or 5867 counting only the distinct ones).

The product of its (nonzero) digits is 1185408, while the sum is 45.

The spelling of 64773734400 in words is "sixty-four billion, seven hundred seventy-three million, seven hundred thirty-four thousand, four hundred".