1368135643 has 32 divisors (see below), whose sum is σ = 1652281344. Its totient is φ = 1108380672.

The previous prime is 1368135631. The next prime is 1368135649. The reversal of 1368135643 is 3465318631.

It is a de Polignac number, because none of the positive numbers 2^k-1368135643 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 1368135596 and 1368135605.

It is not an unprimeable number, because it can be changed into a prime (1368135649) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 2032555 + ... + 2033227.

It is an arithmetic number, because the mean of its divisors is an integer number (51633792).

Almost surely, 2^1368135643 is an apocalyptic number.

1368135643 is a deficient number, since it is larger than the sum of its proper divisors (284145701).

1368135643 is a wasteful number, since it uses less digits than its factorization.

1368135643 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 931.

The product of its digits is 155520, while the sum is 40.

The square root of 1368135643 is about 36988.3176557139. The cubic root of 1368135643 is about 1110.1365097376.

The spelling of 1368135643 in words is "one billion, three hundred sixty-eight million, one hundred thirty-five thousand, six hundred forty-three".