64389494977600 has 168 divisors, whose sum is σ = 170633581251840. Its totient is φ = 23773522298880.

The previous prime is 64389494977597. The next prime is 64389494977601. The reversal of 64389494977600 is 677949498346.

It is not an unprimeable number, because it can be changed into a prime (64389494977601) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 585735441 + ... + 585845359.

It is an arithmetic number, because the mean of its divisors is an integer number (1015676078880).

Almost surely, 2^{64389494977600} is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 64389494977600, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (85316790625920).

64389494977600 is an abundant number, since it is smaller than the sum of its proper divisors (106244086274240).

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

64389494977600 is a wasteful number, since it uses less digits than its factorization.

64389494977600 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 138117 (or 138102 counting only the distinct ones).

The product of its (nonzero) digits is 1975228416, while the sum is 76.

The spelling of 64389494977600 in words is "sixty-four trillion, three hundred eighty-nine billion, four hundred ninety-four million, nine hundred seventy-seven thousand, six hundred".