68455774321 has 6 divisors (see below), whose sum is σ = 75244776866. Its totient is φ = 62232522000.

The previous prime is 68455774319. The next prime is 68455774333. The reversal of 68455774321 is 12347755486.

68455774321 = T₁₉₂₃₉ + T₁₉₂₄₀ + ... + T₁₉₆₀₁.

It can be written as a sum of positive squares in only one way, i.e., 40588146225 + 27867628096 = 201465^2 + 166936^2 .

It is not a de Polignac number, because 68455774321 - 2¹ = 68455774319 is a prime.

It is a super-2 number, since 2×68455774321² (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 (68455774351) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 282874980 + ... + 282875221.

Almost surely, 2^68455774321 is an apocalyptic number.

It is an amenable number.

68455774321 is a deficient number, since it is larger than the sum of its proper divisors (6789002545).

68455774321 is a wasteful number, since it uses less digits than its factorization.

68455774321 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 565750223 (or 565750212 counting only the distinct ones).

The product of its digits is 5644800, while the sum is 52.

The spelling of 68455774321 in words is "sixty-eight billion, four hundred fifty-five million, seven hundred seventy-four thousand, three hundred twenty-one".