1375165643 has 4 divisors (see below), whose sum is σ = 1412332320. Its totient is φ = 1337998968.

The previous prime is 1375165619. The next prime is 1375165661. The reversal of 1375165643 is 3465615731.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 3465615731 = 599 ⋅5785669.

It is a cyclic number.

It is not a de Polignac number, because 1375165643 - 2⁶ = 1375165579 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 1375165643.

It is not an unprimeable number, because it can be changed into a prime (1375164643) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 18583283 + ... + 18583356.

It is an arithmetic number, because the mean of its divisors is an integer number (353083080).

Almost surely, 2^1375165643 is an apocalyptic number.

1375165643 is a deficient number, since it is larger than the sum of its proper divisors (37166677).

1375165643 is an equidigital number, since it uses as much as digits as its factorization.

1375165643 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 37166676.

The product of its digits is 226800, while the sum is 41.

The square root of 1375165643 is about 37083.2258979717. The cubic root of 1375165643 is about 1112.0346964292.

The spelling of 1375165643 in words is "one billion, three hundred seventy-five million, one hundred sixty-five thousand, six hundred forty-three".