202644442664 has 8 divisors (see below), whose sum is σ = 379958330010. Its totient is φ = 101322221328.

The previous prime is 202644442631. The next prime is 202644442697. The reversal of 202644442664 is 466244446202.

202644442664 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is an interprime number because it is at equal distance from previous prime (202644442631) and next prime (202644442697).

It can be written as a sum of positive squares in only one way, i.e., 131065720900 + 71578721764 = 362030^2 + 267542^2 .

It is a tau number, because it is divible by the number of its divisors (8).

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 12665277659 + ... + 12665277674.

Almost surely, 2^202644442664 is an apocalyptic number.

It is an amenable number.

202644442664 is a deficient number, since it is larger than the sum of its proper divisors (177313887346).

202644442664 is a wasteful number, since it uses less digits than its factorization.

202644442664 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 25330555339 (or 25330555335 counting only the distinct ones).

The product of its (nonzero) digits is 1769472, while the sum is 44.

Adding to 202644442664 its reverse (466244446202), we get a palindrome (668888888866).

The spelling of 202644442664 in words is "two hundred two billion, six hundred forty-four million, four hundred forty-two thousand, six hundred sixty-four".