646064660503464 has 32 divisors (see below), whose sum is σ = 1615162273989120. Its totient is φ = 215354803803776.

The previous prime is 646064660503373. The next prime is 646064660503501. The reversal of 646064660503464 is 464305066460646.

It is a junction number, because it is equal to n+sod(n) for n = 646064660503398 and 646064660503407.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 119414812 + ... + 124707764.

It is an arithmetic number, because the mean of its divisors is an integer number (50473821062160).

Almost surely, 2^{646064660503464} is an apocalyptic number.

It is an amenable number.

646064660503464 is an abundant number, since it is smaller than the sum of its proper divisors (969097613485656).

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

646064660503464 is a wasteful number, since it uses less digits than its factorization.

646064660503464 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10378849 (or 10378845 counting only the distinct ones).

The product of its (nonzero) digits is 179159040, while the sum is 60.

The spelling of 646064660503464 in words is "six hundred forty-six trillion, sixty-four billion, six hundred sixty million, five hundred three thousand, four hundred sixty-four".