64420466646 has 16 divisors (see below), whose sum is σ = 128850930864. Its totient is φ = 21471822624.

The previous prime is 64420466581. The next prime is 64420466713. The reversal of 64420466646 is 64666402446.

It is a junction number, because it is equal to n+sod(n) for n = 64420466595 and 64420466604.

It is a congruent number.

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, 331461 + ... + 488576.

It is an arithmetic number, because the mean of its divisors is an integer number (8053183179).

Almost surely, 2^64420466646 is an apocalyptic number.

64420466646 is an abundant number, since it is smaller than the sum of its proper divisors (64430464218).

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

64420466646 is a wasteful number, since it uses less digits than its factorization.

64420466646 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 833135.

The product of its (nonzero) digits is 3981312, while the sum is 48.

The spelling of 64420466646 in words is "sixty-four billion, four hundred twenty million, four hundred sixty-six thousand, six hundred forty-six".