65856578304 has 144 divisors (see below), whose sum is σ = 191368437120. Its totient is φ = 19939860480.

The previous prime is 65856578303. The next prime is 65856578321. The reversal of 65856578304 is 40387565856.

It is not an unprimeable number, because it can be changed into a prime (65856578303) by changing a digit.

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, 13336924 + ... + 13341860.

It is an arithmetic number, because the mean of its divisors is an integer number (1328947480).

Almost surely, 2^65856578304 is an apocalyptic number.

65856578304 is a gapful number since it is divisible by the number (64) 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 65856578304, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (95684218560).

65856578304 is an abundant number, since it is smaller than the sum of its proper divisors (125511858816).

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

65856578304 is a wasteful number, since it uses less digits than its factorization.

65856578304 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6546 (or 6532 counting only the distinct ones).

The product of its (nonzero) digits is 24192000, while the sum is 57.

The spelling of 65856578304 in words is "sixty-five billion, eight hundred fifty-six million, five hundred seventy-eight thousand, three hundred four".