1375831687133 has 4 divisors (see below), whose sum is σ = 1376400920700. Its totient is φ = 1375262453568.

The previous prime is 1375831687127. The next prime is 1375831687171. The reversal of 1375831687133 is 3317861385731.

It is a happy number.

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 1138153986649 + 237677700484 = 1066843^2 + 487522^2 .

It is a cyclic number.

It is not a de Polignac number, because 1375831687133 - 2¹⁴ = 1375831670749 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1375831687193) 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, 284613158 + ... + 284617991.

It is an arithmetic number, because the mean of its divisors is an integer number (344100230175).

Almost surely, 2^{1375831687133} is an apocalyptic number.

It is an amenable number.

1375831687133 is a deficient number, since it is larger than the sum of its proper divisors (569233567).

1375831687133 is an equidigital number, since it uses as much as digits as its factorization.

1375831687133 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 569233566.

The product of its digits is 7620480, while the sum is 56.

The spelling of 1375831687133 in words is "one trillion, three hundred seventy-five billion, eight hundred thirty-one million, six hundred eighty-seven thousand, one hundred thirty-three".