242693575681 has 4 divisors (see below), whose sum is σ = 251062319700. Its totient is φ = 234324831664.

The previous prime is 242693575613. The next prime is 242693575697. The reversal of 242693575681 is 186575396242.

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

It can be written as a sum of positive squares in 2 ways, for example, as 56206926400 + 186486649281 = 237080^2 + 431841^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-242693575681 is a prime.

It is a super-2 number, since 2×242693575681² (a number of 24 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (242693575181) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4184371966 + ... + 4184372023.

It is an arithmetic number, because the mean of its divisors is an integer number (62765579925).

Almost surely, 2^242693575681 is an apocalyptic number.

It is an amenable number.

242693575681 is a deficient number, since it is larger than the sum of its proper divisors (8368744019).

242693575681 is an equidigital number, since it uses as much as digits as its factorization.

242693575681 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8368744018.

The product of its digits is 21772800, while the sum is 58.

The spelling of 242693575681 in words is "two hundred forty-two billion, six hundred ninety-three million, five hundred seventy-five thousand, six hundred eighty-one".