68726266381 has 4 divisors (see below), whose sum is σ = 69596219200. Its totient is φ = 67856313564.

The previous prime is 68726266379. The next prime is 68726266409. The reversal of 68726266381 is 18366262786.

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 68726266381 - 2¹ = 68726266379 is a prime.

It is a super-2 number, since 2×68726266381² (a number of 22 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (68726266321) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 434976291 + ... + 434976448.

It is an arithmetic number, because the mean of its divisors is an integer number (17399054800).

Almost surely, 2^68726266381 is an apocalyptic number.

It is an amenable number.

68726266381 is a deficient number, since it is larger than the sum of its proper divisors (869952819).

68726266381 is an equidigital number, since it uses as much as digits as its factorization.

68726266381 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 869952818.

The product of its digits is 6967296, while the sum is 55.

The spelling of 68726266381 in words is "sixty-eight billion, seven hundred twenty-six million, two hundred sixty-six thousand, three hundred eighty-one".