64997389419552 has 1152 divisors, whose sum is σ = 210559349145600. Its totient is φ = 18921510254592.

The previous prime is 64997389419511. The next prime is 64997389419559. The reversal of 64997389419552 is 25591498379946.

64997389419552 is a `hidden beast` number, since 6 + 4 + 9 + 9 + 73 + 89 + 419 + 5 + 52 = 666.

It is not an unprimeable number, because it can be changed into a prime (64997389419559) by changing a digit.

It is a polite number, since it can be written in 191 ways as a sum of consecutive naturals, for example, 100459643293 + ... + 100459643939.

It is an arithmetic number, because the mean of its divisors is an integer number (182777212800).

Almost surely, 2^{64997389419552} 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 64997389419552, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (105279674572800).

64997389419552 is an abundant number, since it is smaller than the sum of its proper divisors (145561959726048).

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

64997389419552 is a wasteful number, since it uses less digits than its factorization.

64997389419552 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1010 (or 999 counting only the distinct ones).

The product of its digits is 5290790400, while the sum is 81.

The spelling of 64997389419552 in words is "sixty-four trillion, nine hundred ninety-seven billion, three hundred eighty-nine million, four hundred nineteen thousand, five hundred fifty-two".