64918728552 has 16 divisors (see below), whose sum is σ = 162296821440. Its totient is φ = 21639576176.

The previous prime is 64918728551. The next prime is 64918728577. The reversal of 64918728552 is 25582781946.

It is a junction number, because it is equal to n+sod(n) for n = 64918728492 and 64918728501.

It is not an unprimeable number, because it can be changed into a prime (64918728551) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1352473488 + ... + 1352473535.

It is an arithmetic number, because the mean of its divisors is an integer number (10143551340).

Almost surely, 2^64918728552 is an apocalyptic number.

It is an amenable number.

64918728552 is an abundant number, since it is smaller than the sum of its proper divisors (97378092888).

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

64918728552 is a wasteful number, since it uses less digits than its factorization.

64918728552 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2704947032 (or 2704947028 counting only the distinct ones).

The product of its digits is 9676800, while the sum is 57.

The spelling of 64918728552 in words is "sixty-four billion, nine hundred eighteen million, seven hundred twenty-eight thousand, five hundred fifty-two".