64603430646 has 16 divisors (see below), whose sum is σ = 130976819184. Its totient is φ = 21239483904.

The previous prime is 64603430603. The next prime is 64603430657.

64603430646 is nontrivially palindromic in base 10.

It is a junction number, because it is equal to n+sod(n) for n = 64603430598 and 64603430607.

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, 73747771 + ... + 73748646.

It is an arithmetic number, because the mean of its divisors is an integer number (8186051199).

Almost surely, 2^64603430646 is an apocalyptic number.

64603430646 is an abundant number, since it is smaller than the sum of its proper divisors (66373388538).

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

64603430646 is a wasteful number, since it uses less digits than its factorization.

64603430646 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 147496495.

The product of its (nonzero) digits is 746496, while the sum is 42.

The spelling of 64603430646 in words is "sixty-four billion, six hundred three million, four hundred thirty thousand, six hundred forty-six".