64711782960 has 80 divisors (see below), whose sum is σ = 218843493120. Its totient is φ = 15687704320.

The previous prime is 64711782953. The next prime is 64711782983. The reversal of 64711782960 is 6928711746.

It is a tau number, because it is divible by the number of its divisors (80).

It is a super-2 number, since 2×64711782960² (a number of 22 digits) contains 22 as substring.

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 15 ways as a sum of consecutive naturals, for example, 12253380 + ... + 12258659.

It is an arithmetic number, because the mean of its divisors is an integer number (2735543664).

Almost surely, 2^64711782960 is an apocalyptic number.

64711782960 is a gapful number since it is divisible by the number (60) formed by its first and last digit.

It is an amenable number.

64711782960 is an abundant number, since it is smaller than the sum of its proper divisors (154131710160).

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

64711782960 is a wasteful number, since it uses less digits than its factorization.

64711782960 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 24512066 (or 24512060 counting only the distinct ones).

The product of its (nonzero) digits is 1016064, while the sum is 51.

The spelling of 64711782960 in words is "sixty-four billion, seven hundred eleven million, seven hundred eighty-two thousand, nine hundred sixty".