646625526646 has 16 divisors (see below), whose sum is σ = 1058210334720. Its totient is φ = 293894072680.

The previous prime is 646625526643. The next prime is 646625526653.

646625526646 is nontrivially palindromic in base 10.

646625526646 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (646625526643) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1081606 + ... + 1569433.

It is an arithmetic number, because the mean of its divisors is an integer number (66138145920).

Almost surely, 2^646625526646 is an apocalyptic number.

646625526646 is a deficient number, since it is larger than the sum of its proper divisors (411584808074).

646625526646 is a wasteful number, since it uses less digits than its factorization.

646625526646 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2662139.

The product of its digits is 74649600, while the sum is 58.

The spelling of 646625526646 in words is "six hundred forty-six billion, six hundred twenty-five million, five hundred twenty-six thousand, six hundred forty-six".