64476403866128 has 20 divisors (see below), whose sum is σ = 132271446167100. Its totient is φ = 30341837113344.

The previous prime is 64476403865983. The next prime is 64476403866131. The reversal of 64476403866128 is 82166830467446.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 33471686262784 + 31004717603344 = 5785472^2 + 5568188^2 .

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, 118522800953 + ... + 118522801496.

It is an arithmetic number, because the mean of its divisors is an integer number (6613572308355).

Almost surely, 2^{64476403866128} is an apocalyptic number.

64476403866128 is a gapful number since it is divisible by the number (68) formed by its first and last digit.

It is an amenable number.

64476403866128 is an abundant number, since it is smaller than the sum of its proper divisors (67795042300972).

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

64476403866128 is a wasteful number, since it uses less digits than its factorization.

64476403866128 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 237045602474 (or 237045602468 counting only the distinct ones).

The product of its (nonzero) digits is 222953472, while the sum is 65.

The spelling of 64476403866128 in words is "sixty-four trillion, four hundred seventy-six billion, four hundred three million, eight hundred sixty-six thousand, one hundred twenty-eight".