68358183281 has 4 divisors (see below), whose sum is σ = 68365462512. Its totient is φ = 68350904052.

The previous prime is 68358183277. The next prime is 68358183307. The reversal of 68358183281 is 18238185386.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 68358183281 - 2² = 68358183277 is a prime.

It is a super-2 number, since 2×68358183281² (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 (68358183241) 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, 3625511 + ... + 3644316.

It is an arithmetic number, because the mean of its divisors is an integer number (17091365628).

Almost surely, 2^68358183281 is an apocalyptic number.

It is an amenable number.

68358183281 is a deficient number, since it is larger than the sum of its proper divisors (7279231).

68358183281 is an equidigital number, since it uses as much as digits as its factorization.

68358183281 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7279230.

The product of its digits is 2211840, while the sum is 53.

The spelling of 68358183281 in words is "sixty-eight billion, three hundred fifty-eight million, one hundred eighty-three thousand, two hundred eighty-one".