1368189551 has 4 divisors (see below), whose sum is σ = 1368483600. Its totient is φ = 1367895504.

The previous prime is 1368189547. The next prime is 1368189553. The reversal of 1368189551 is 1559818631.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 1368189551 - 2² = 1368189547 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1368189496 and 1368189505.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1368189553) 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 3 ways as a sum of consecutive naturals, for example, 139931 + ... + 149388.

It is an arithmetic number, because the mean of its divisors is an integer number (342120900).

Almost surely, 2^1368189551 is an apocalyptic number.

1368189551 is a deficient number, since it is larger than the sum of its proper divisors (294049).

1368189551 is an equidigital number, since it uses as much as digits as its factorization.

1368189551 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 294048.

The product of its digits is 259200, while the sum is 47.

The square root of 1368189551 is about 36989.0463651065. The cubic root of 1368189551 is about 1110.1510902736.

The spelling of 1368189551 in words is "one billion, three hundred sixty-eight million, one hundred eighty-nine thousand, five hundred fifty-one".