64787311678 has 16 divisors (see below), whose sum is σ = 103896505440. Its totient is φ = 30192143616.

The previous prime is 64787311669. The next prime is 64787311811. The reversal of 64787311678 is 87611378746.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 9246543 + ... + 9253546.

It is an arithmetic number, because the mean of its divisors is an integer number (6493531590).

Almost surely, 2^64787311678 is an apocalyptic number.

64787311678 is a deficient number, since it is larger than the sum of its proper divisors (39109193762).

64787311678 is a wasteful number, since it uses less digits than its factorization.

64787311678 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 18500211.

The product of its digits is 9483264, while the sum is 58.

The spelling of 64787311678 in words is "sixty-four billion, seven hundred eighty-seven million, three hundred eleven thousand, six hundred seventy-eight".