1375188381617 has 4 divisors (see below), whose sum is σ = 1375330324260. Its totient is φ = 1375046438976.

The previous prime is 1375188381563. The next prime is 1375188381629. The reversal of 1375188381617 is 7161838815731.

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 495501958561 + 879686423056 = 703919^2 + 937916^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1375188381617 is a prime.

It is a super-2 number, since 2×1375188381617² (a number of 25 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1375188380617) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 70956788 + ... + 70976165.

It is an arithmetic number, because the mean of its divisors is an integer number (343832581065).

Almost surely, 2^{1375188381617} is an apocalyptic number.

It is an amenable number.

1375188381617 is a deficient number, since it is larger than the sum of its proper divisors (141942643).

1375188381617 is an equidigital number, since it uses as much as digits as its factorization.

1375188381617 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 141942642.

The product of its digits is 6773760, while the sum is 59.

The spelling of 1375188381617 in words is "one trillion, three hundred seventy-five billion, one hundred eighty-eight million, three hundred eighty-one thousand, six hundred seventeen".