64667532521250 has 480 divisors, whose sum is σ = 193614733952640. Its totient is φ = 15510958848000.

The previous prime is 64667532521243. The next prime is 64667532521261. The reversal of 64667532521250 is 5212523576646.

64667532521250 is a `hidden beast` number, since 6 + 4 + 6 + 6 + 7 + 532 + 52 + 1 + 2 + 50 = 666.

It is an unprimeable number.

It is a polite number, since it can be written in 239 ways as a sum of consecutive naturals, for example, 5538020412 + ... + 5538032088.

It is an arithmetic number, because the mean of its divisors is an integer number (403364029068).

Almost surely, 2^{64667532521250} is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 64667532521250, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (96807366976320).

64667532521250 is an abundant number, since it is smaller than the sum of its proper divisors (128947201431390).

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

64667532521250 is a wasteful number, since it uses less digits than its factorization.

64667532521250 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13004 (or 12986 counting only the distinct ones).

The product of its (nonzero) digits is 18144000, while the sum is 54.

The spelling of 64667532521250 in words is "sixty-four trillion, six hundred sixty-seven billion, five hundred thirty-two million, five hundred twenty-one thousand, two hundred fifty".