64506036256 has 24 divisors (see below), whose sum is σ = 132517836864. Its totient is φ = 30850712640.

The previous prime is 64506036247. The next prime is 64506036263. The reversal of 64506036256 is 65263060546.

It is a super-2 number, since 2×64506036256² (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 (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 43821300 + ... + 43822771.

It is an arithmetic number, because the mean of its divisors is an integer number (5521576536).

Almost surely, 2^64506036256 is an apocalyptic number.

It is an amenable number.

64506036256 is an abundant number, since it is smaller than the sum of its proper divisors (68011800608).

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

64506036256 is a wasteful number, since it uses less digits than its factorization.

64506036256 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 87644104 (or 87644096 counting only the distinct ones).

The product of its (nonzero) digits is 777600, while the sum is 43.

The spelling of 64506036256 in words is "sixty-four billion, five hundred six million, thirty-six thousand, two hundred fifty-six".