243837452401 has 27 divisors (see below), whose sum is σ = 267935677857. Its totient is φ = 221854014720.

The previous prime is 243837452399. The next prime is 243837452477. The reversal of 243837452401 is 104254738342.

The square root of 243837452401 is 493799.

It is a perfect power (a square), and thus also a powerful number.

It can be written as a sum of positive squares in 4 ways, for example, as 15926692401 + 227910760000 = 126201^2 + 477400^2 .

It is not a de Polignac number, because 243837452401 - 2¹ = 243837452399 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (243837452101) by changing a digit.

It is a polite number, since it can be written in 26 ways as a sum of consecutive naturals, for example, 260231605 + ... + 260232541.

Almost surely, 2^243837452401 is an apocalyptic number.

243837452401 is the 493799-th square number.

243837452401 is the 246900-th centered octagonal number.

It is an amenable number.

243837452401 is a deficient number, since it is larger than the sum of its proper divisors (24098225456).

243837452401 is an frugal number, since it uses more digits than its factorization.

243837452401 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1970 (or 985 counting only the distinct ones).

The product of its (nonzero) digits is 645120, while the sum is 43.

The spelling of 243837452401 in words is "two hundred forty-three billion, eight hundred thirty-seven million, four hundred fifty-two thousand, four hundred one".