64531359386 has 16 divisors (see below), whose sum is σ = 106009797600.
Its totient is φ = 29278895088.
The previous prime is 64531359379. The next prime is 64531359391. The reversal of 64531359386 is 68395313546.
It is an unprimeable number.
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 7 ways as a sum of consecutive naturals, for example, 21032156 + ... + 21035223.
It is an arithmetic number, because the mean of its divisors is an integer number (6625612350).
Almost surely, 264531359386 is an apocalyptic number.
64531359386 is a deficient number, since it is larger than the sum of its proper divisors (41478438214).
64531359386 is a wasteful number, since it uses less digits than its factorization.
64531359386 is an odious number, because the sum of its binary digits is odd.
The sum of its prime factors is 42067453.
The product of its digits is 6998400, while the sum is 53.
The spelling of 64531359386 in words is "sixty-four billion, five hundred thirty-one million, three hundred fifty-nine thousand, three hundred eighty-six".