243889940454 has 16 divisors (see below), whose sum is σ = 503514716160. Its totient is φ = 78674174280.

The previous prime is 243889940447. The next prime is 243889940461. The reversal of 243889940454 is 454049988342.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (243889940447) and next prime (243889940461).

It is a super-2 number, since 2×243889940454² (a number of 24 digits) contains 22 as substring.

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, 655617934 + ... + 655618305.

It is an arithmetic number, because the mean of its divisors is an integer number (31469669760).

Almost surely, 2^243889940454 is an apocalyptic number.

243889940454 is an abundant number, since it is smaller than the sum of its proper divisors (259624775706).

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

243889940454 is a wasteful number, since it uses less digits than its factorization.

243889940454 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1311236275.

The product of its (nonzero) digits is 39813120, while the sum is 60.

The spelling of 243889940454 in words is "two hundred forty-three billion, eight hundred eighty-nine million, nine hundred forty thousand, four hundred fifty-four".