243145256622621 has 16 divisors (see below), whose sum is σ = 334795200824448. Its totient is φ = 156844483876800.

The previous prime is 243145256622599. The next prime is 243145256622623. The reversal of 243145256622621 is 126226652541342.

It is not a de Polignac number, because 243145256622621 - 2²¹ = 243145254525469 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (243145256622623) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 6051078825 + ... + 6051119006.

It is an arithmetic number, because the mean of its divisors is an integer number (20924700051528).

Almost surely, 2^{243145256622621} is an apocalyptic number.

It is an amenable number.

243145256622621 is a deficient number, since it is larger than the sum of its proper divisors (91649944201827).

243145256622621 is a wasteful number, since it uses less digits than its factorization.

243145256622621 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12102198052.

The product of its digits is 8294400, while the sum is 51.

The spelling of 243145256622621 in words is "two hundred forty-three trillion, one hundred forty-five billion, two hundred fifty-six million, six hundred twenty-two thousand, six hundred twenty-one".