243630362554 has 4 divisors (see below), whose sum is σ = 365445543834. Its totient is φ = 121815181276.

The previous prime is 243630362551. The next prime is 243630362567. The reversal of 243630362554 is 455263036342.

243630362554 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 154781656929 + 88848705625 = 393423^2 + 298075^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 243630362554.

It is not an unprimeable number, because it can be changed into a prime (243630362551) by changing a digit.

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, 60907590637 + ... + 60907590640.

Almost surely, 2^243630362554 is an apocalyptic number.

243630362554 is a deficient number, since it is larger than the sum of its proper divisors (121815181280).

243630362554 is a wasteful number, since it uses less digits than its factorization.

243630362554 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 121815181279.

The product of its (nonzero) digits is 1555200, while the sum is 43.

Adding to 243630362554 its reverse (455263036342), we get a palindrome (698893398896).

The spelling of 243630362554 in words is "two hundred forty-three billion, six hundred thirty million, three hundred sixty-two thousand, five hundred fifty-four".