1368858881 has 4 divisors (see below), whose sum is σ = 1474155732. Its totient is φ = 1263562032.

The previous prime is 1368858851. The next prime is 1368858889. The reversal of 1368858881 is 1888588631.

It is a happy number.

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 67092481 + 1301766400 = 8191^2 + 36080^2 .

It is a cyclic number.

It is not a de Polignac number, because 1368858881 - 2⁶ = 1368858817 is a prime.

It is a super-2 number, since 2×1368858881² = 3747549272185144322, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1368858889) 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, 52648406 + ... + 52648431.

It is an arithmetic number, because the mean of its divisors is an integer number (368538933).

Almost surely, 2^1368858881 is an apocalyptic number.

It is an amenable number.

1368858881 is a deficient number, since it is larger than the sum of its proper divisors (105296851).

1368858881 is a wasteful number, since it uses less digits than its factorization.

1368858881 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 105296850.

The product of its digits is 2949120, while the sum is 56.

The square root of 1368858881 is about 36998.0929373394. The cubic root of 1368858881 is about 1110.3320925555.

The spelling of 1368858881 in words is "one billion, three hundred sixty-eight million, eight hundred fifty-eight thousand, eight hundred eighty-one".