243947400554 has 32 divisors (see below), whose sum is σ = 436940784000. Its totient is φ = 100677585600.

The previous prime is 243947400539. The next prime is 243947400589. The reversal of 243947400554 is 455004749342.

It is a junction number, because it is equal to n+sod(n) for n = 243947400499 and 243947400508.

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, 6974054 + ... + 7008945.

It is an arithmetic number, because the mean of its divisors is an integer number (13654399500).

Almost surely, 2^243947400554 is an apocalyptic number.

243947400554 is a deficient number, since it is larger than the sum of its proper divisors (192993383446).

243947400554 is a wasteful number, since it uses less digits than its factorization.

243947400554 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13983086.

The product of its (nonzero) digits is 2419200, while the sum is 47.

The spelling of 243947400554 in words is "two hundred forty-three billion, nine hundred forty-seven million, four hundred thousand, five hundred fifty-four".