243245521642 has 4 divisors (see below), whose sum is σ = 364868282466. Its totient is φ = 121622760820.

The previous prime is 243245521639. The next prime is 243245521769. The reversal of 243245521642 is 246125542342.

243245521642 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

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

It can be written as a sum of positive squares in only one way, i.e., 239640599961 + 3604921681 = 489531^2 + 60041^2 .

It is a super-3 number, since 3×243245521642³ (a number of 35 digits) contains 333 as substring.

It is a Smith number, since the sum of its digits (40) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a junction number, because it is equal to n+sod(n) for n = 243245521595 and 243245521604.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 60811380409 + ... + 60811380412.

Almost surely, 2^243245521642 is an apocalyptic number.

243245521642 is a deficient number, since it is larger than the sum of its proper divisors (121622760824).

243245521642 is a wasteful number, since it uses less digits than its factorization.

243245521642 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 121622760823.

The product of its digits is 460800, while the sum is 40.

The spelling of 243245521642 in words is "two hundred forty-three billion, two hundred forty-five million, five hundred twenty-one thousand, six hundred forty-two".