1368164881 has 4 divisors (see below), whose sum is σ = 1412299264. Its totient is φ = 1324030500.

The previous prime is 1368164869. The next prime is 1368164893. The reversal of 1368164881 is 1884618631.

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, and also an emirpimes, since its reverse is a distinct semiprime: 1884618631 = 7 ⋅269231233.

It is an interprime number because it is at equal distance from previous prime (1368164869) and next prime (1368164893).

It is a cyclic number.

It is not a de Polignac number, because 1368164881 - 2¹⁵ = 1368132113 is a prime.

It is a super-2 number, since 2×1368164881² = 3743750283203488322, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1368164801) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 22067145 + ... + 22067206.

It is an arithmetic number, because the mean of its divisors is an integer number (353074816).

Almost surely, 2^1368164881 is an apocalyptic number.

It is an amenable number.

1368164881 is a deficient number, since it is larger than the sum of its proper divisors (44134383).

1368164881 is an equidigital number, since it uses as much as digits as its factorization.

1368164881 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 44134382.

The product of its digits is 221184, while the sum is 46.

The square root of 1368164881 is about 36988.7128865009. The cubic root of 1368164881 is about 1110.1444178083.

The spelling of 1368164881 in words is "one billion, three hundred sixty-eight million, one hundred sixty-four thousand, eight hundred eighty-one".