64188725312650 has 24 divisors (see below), whose sum is σ = 119393877727980. Its totient is φ = 25674877512960.

The previous prime is 64188725312611. The next prime is 64188725312693. The reversal of 64188725312650 is 5621352788146.

It can be written as a sum of positive squares in 6 ways, for example, as 28409294421369 + 35779430891281 = 5330037^2 + 5981591^2 .

It is a super-3 number, since 3×64188725312650³ (a number of 42 digits) contains 333 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 13195869 + ... + 17392768.

Almost surely, 2^{64188725312650} is an apocalyptic number.

64188725312650 is a deficient number, since it is larger than the sum of its proper divisors (55205152415330).

64188725312650 is a wasteful number, since it uses less digits than its factorization.

64188725312650 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 30630618 (or 30630613 counting only the distinct ones).

The product of its (nonzero) digits is 19353600, while the sum is 58.

The spelling of 64188725312650 in words is "sixty-four trillion, one hundred eighty-eight billion, seven hundred twenty-five million, three hundred twelve thousand, six hundred fifty".