64878546892 has 12 divisors (see below), whose sum is σ = 115461821160. Its totient is φ = 31889455136.

The previous prime is 64878546877. The next prime is 64878546959. The reversal of 64878546892 is 29864587846.

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 3 ways as a sum of consecutive naturals, for example, 137454313 + ... + 137454784.

It is an arithmetic number, because the mean of its divisors is an integer number (9621818430).

Almost surely, 2^64878546892 is an apocalyptic number.

It is an amenable number.

64878546892 is a deficient number, since it is larger than the sum of its proper divisors (50583274268).

64878546892 is a wasteful number, since it uses less digits than its factorization.

64878546892 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 274909160 (or 274909158 counting only the distinct ones).

The product of its digits is 185794560, while the sum is 67.

The spelling of 64878546892 in words is "sixty-four billion, eight hundred seventy-eight million, five hundred forty-six thousand, eight hundred ninety-two".