64650971924388 has 96 divisors (see below), whose sum is σ = 172256774632320. Its totient is φ = 20954113326720.

The previous prime is 64650971924387. The next prime is 64650971924467. The reversal of 64650971924388 is 88342917905646.

64650971924388 is a `hidden beast` number, since 6 + 4 + 6 + 50 + 9 + 7 + 192 + 4 + 388 = 666.

It is not an unprimeable number, because it can be changed into a prime (64650971924387) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 774378 + ... + 11397438.

It is an arithmetic number, because the mean of its divisors is an integer number (1794341402420).

It is a 1-persistent number, because it is pandigital, but 2⋅64650971924388 = 129301943848776 is not.

Almost surely, 2^{64650971924388} 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 64650971924388, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (86128387316160).

64650971924388 is an abundant number, since it is smaller than the sum of its proper divisors (107605802707932).

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

64650971924388 is a wasteful number, since it uses less digits than its factorization.

64650971924388 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10624634 (or 10624626 counting only the distinct ones).

The product of its (nonzero) digits is 627056640, while the sum is 72.

The spelling of 64650971924388 in words is "sixty-four trillion, six hundred fifty billion, nine hundred seventy-one million, nine hundred twenty-four thousand, three hundred eighty-eight".