642544445246 has 32 divisors (see below), whose sum is σ = 1065949175808. Its totient is φ = 288035144640.

The previous prime is 642544445233. The next prime is 642544445269.

It is a happy number.

642544445246 is nontrivially palindromic in base 10.

642544445246 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 = 642544445194 and 642544445203.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 25341251 + ... + 25366593.

It is an arithmetic number, because the mean of its divisors is an integer number (33310911744).

Almost surely, 2^642544445246 is an apocalyptic number.

642544445246 is a deficient number, since it is larger than the sum of its proper divisors (423404730562).

642544445246 is a wasteful number, since it uses less digits than its factorization.

642544445246 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 41216.

The product of its digits is 14745600, while the sum is 50.

The spelling of 642544445246 in words is "six hundred forty-two billion, five hundred forty-four million, four hundred forty-five thousand, two hundred forty-six".