1375968193949 has 4 divisors (see below), whose sum is σ = 1378257659100. Its totient is φ = 1373678728800.

The previous prime is 1375968193877. The next prime is 1375968193991. The reversal of 1375968193949 is 9493918695731.

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 1219533705625 + 156434488324 = 1104325^2 + 395518^2 .

It is a cyclic number.

It is not a de Polignac number, because 1375968193949 - 2⁸ = 1375968193693 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1375968123949) 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, 1144731674 + ... + 1144732875.

It is an arithmetic number, because the mean of its divisors is an integer number (344564414775).

Almost surely, 2^{1375968193949} is an apocalyptic number.

It is an amenable number.

1375968193949 is a deficient number, since it is larger than the sum of its proper divisors (2289465151).

1375968193949 is an equidigital number, since it uses as much as digits as its factorization.

1375968193949 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2289465150.

The product of its digits is 396809280, while the sum is 74.

The spelling of 1375968193949 in words is "one trillion, three hundred seventy-five billion, nine hundred sixty-eight million, one hundred ninety-three thousand, nine hundred forty-nine".