1368467681 has 16 divisors (see below), whose sum is σ = 1607637120. Its totient is φ = 1140272640.

The previous prime is 1368467677. The next prime is 1368467707. The reversal of 1368467681 is 1867648631.

It is a cyclic number.

It is not a de Polignac number, because 1368467681 - 2² = 1368467677 is a prime.

It is a super-2 number, since 2×1368467681² = 3745407587883035522, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1368467671) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 537710 + ... + 540248.

It is an arithmetic number, because the mean of its divisors is an integer number (100477320).

Almost surely, 2^1368467681 is an apocalyptic number.

It is an amenable number.

1368467681 is a deficient number, since it is larger than the sum of its proper divisors (239169439).

1368467681 is a wasteful number, since it uses less digits than its factorization.

1368467681 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4664.

The product of its digits is 1161216, while the sum is 50.

The square root of 1368467681 is about 36992.8058005878. The cubic root of 1368467681 is about 1110.2263102124.

The spelling of 1368467681 in words is "one billion, three hundred sixty-eight million, four hundred sixty-seven thousand, six hundred eighty-one".