68571724072042 has 4 divisors (see below), whose sum is σ = 102857586108066. Its totient is φ = 34285862036020.

The previous prime is 68571724072031. The next prime is 68571724072043. The reversal of 68571724072042 is 24027042717586.

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., 56227667217121 + 12344056854921 = 7498511^2 + 3513411^2 .

It is not an unprimeable number, because it can be changed into a prime (68571724072043) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 17142931018009 + ... + 17142931018012.

Almost surely, 2^{68571724072042} is an apocalyptic number.

68571724072042 is a deficient number, since it is larger than the sum of its proper divisors (34285862036024).

68571724072042 is a wasteful number, since it uses less digits than its factorization.

68571724072042 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 34285862036023.

The product of its (nonzero) digits is 10536960, while the sum is 55.

The spelling of 68571724072042 in words is "sixty-eight trillion, five hundred seventy-one billion, seven hundred twenty-four million, seventy-two thousand, forty-two".