68048522281 has 4 divisors (see below), whose sum is σ = 68401105492. Its totient is φ = 67695939072.

The previous prime is 68048522273. The next prime is 68048522291. The reversal of 68048522281 is 18222584086.

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 18675682281 + 49372840000 = 136659^2 + 222200^2 .

It is a cyclic number.

It is not a de Polignac number, because 68048522281 - 2³ = 68048522273 is a prime.

It is a super-2 number, since 2×68048522281² (a number of 22 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (68048522291) 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, 176291316 + ... + 176291701.

It is an arithmetic number, because the mean of its divisors is an integer number (17100276373).

Almost surely, 2^68048522281 is an apocalyptic number.

It is an amenable number.

68048522281 is a deficient number, since it is larger than the sum of its proper divisors (352583211).

68048522281 is a wasteful number, since it uses less digits than its factorization.

68048522281 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 352583210.

The product of its (nonzero) digits is 491520, while the sum is 46.

The spelling of 68048522281 in words is "sixty-eight billion, forty-eight million, five hundred twenty-two thousand, two hundred eighty-one".