64471887660 has 192 divisors, whose sum is σ = 200688606720. Its totient is φ = 15389552640.

The previous prime is 64471887653. The next prime is 64471887661. The reversal of 64471887660 is 6678817446.

It is a happy number.

It is a self number, because there is not a number n which added to its sum of digits gives 64471887660.

It is not an unprimeable number, because it can be changed into a prime (64471887661) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 1965595 + ... + 1998125.

It is an arithmetic number, because the mean of its divisors is an integer number (1045253160).

Almost surely, 2^64471887660 is an apocalyptic number.

64471887660 is a gapful number since it is divisible by the number (60) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 64471887660, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (100344303360).

64471887660 is an abundant number, since it is smaller than the sum of its proper divisors (136216719060).

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

64471887660 is a wasteful number, since it uses less digits than its factorization.

64471887660 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 32656 (or 32654 counting only the distinct ones).

The product of its (nonzero) digits is 10838016, while the sum is 57.

The spelling of 64471887660 in words is "sixty-four billion, four hundred seventy-one million, eight hundred eighty-seven thousand, six hundred sixty".