64425641440660 has 12 divisors (see below), whose sum is σ = 135293847025428. Its totient is φ = 25770256576256.

The previous prime is 64425641440651. The next prime is 64425641440733. The reversal of 64425641440660 is 6604414652446.

64425641440660 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 2 ways, for example, as 43979020462224 + 20446620978436 = 6631668^2 + 4521794^2 .

It is a junction number, because it is equal to n+sod(n) for n = 64425641440598 and 64425641440607.

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 3 ways as a sum of consecutive naturals, for example, 1610641035997 + ... + 1610641036036.

It is an arithmetic number, because the mean of its divisors is an integer number (11274487252119).

Almost surely, 2^{64425641440660} is an apocalyptic number.

It is an amenable number.

64425641440660 is an abundant number, since it is smaller than the sum of its proper divisors (70868205584768).

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

64425641440660 is a wasteful number, since it uses less digits than its factorization.

64425641440660 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3221282072042 (or 3221282072040 counting only the distinct ones).

The product of its (nonzero) digits is 13271040, while the sum is 52.

The spelling of 64425641440660 in words is "sixty-four trillion, four hundred twenty-five billion, six hundred forty-one million, four hundred forty thousand, six hundred sixty".