64613543250 has 64 divisors (see below), whose sum is σ = 161433762048. Its totient is φ = 17213360000.

The previous prime is 64613543243. The next prime is 64613543273. The reversal of 64613543250 is 5234531646.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 64613543199 and 64613543208.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 731470 + ... + 815030.

It is an arithmetic number, because the mean of its divisors is an integer number (2522402532).

Almost surely, 2^64613543250 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 64613543250, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (80716881024).

64613543250 is an abundant number, since it is smaller than the sum of its proper divisors (96820218798).

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

64613543250 is a wasteful number, since it uses less digits than its factorization.

64613543250 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 84612 (or 84602 counting only the distinct ones).

The product of its (nonzero) digits is 259200, while the sum is 39.

The spelling of 64613543250 in words is "sixty-four billion, six hundred thirteen million, five hundred forty-three thousand, two hundred fifty".