64630403646 has 16 divisors (see below), whose sum is σ = 130818167424. Its totient is φ = 21283907864.

The previous prime is 64630403611. The next prime is 64630403657.

64630403646 is nontrivially palindromic in base 10.

64630403646 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a junction number, because it is equal to n+sod(n) for n = 64630403598 and 64630403607.

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, 64889466 + ... + 64890461.

It is an arithmetic number, because the mean of its divisors is an integer number (8176135464).

Almost surely, 2^64630403646 is an apocalyptic number.

64630403646 is an abundant number, since it is smaller than the sum of its proper divisors (66187763778).

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

64630403646 is a wasteful number, since it uses less digits than its factorization.

64630403646 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 129780015.

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

The spelling of 64630403646 in words is "sixty-four billion, six hundred thirty million, four hundred three thousand, six hundred forty-six".