1375513777915 has 4 divisors (see below), whose sum is σ = 1650616533504. Its totient is φ = 1100411022328.

The previous prime is 1375513777909. The next prime is 1375513777931. The reversal of 1375513777915 is 5197773155731.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 1375513777915 - 2¹⁵ = 1375513745147 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 137551377787 + ... + 137551377796.

It is an arithmetic number, because the mean of its divisors is an integer number (412654133376).

Almost surely, 2^{1375513777915} is an apocalyptic number.

1375513777915 is a deficient number, since it is larger than the sum of its proper divisors (275102755589).

1375513777915 is an equidigital number, since it uses as much as digits as its factorization.

1375513777915 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 275102755588.

The product of its digits is 24310125, while the sum is 61.

The spelling of 1375513777915 in words is "one trillion, three hundred seventy-five billion, five hundred thirteen million, seven hundred seventy-seven thousand, nine hundred fifteen".