1376783397609 has 16 divisors (see below), whose sum is σ = 1857589698432. Its totient is φ = 906955348608.

The previous prime is 1376783397601. The next prime is 1376783397641. The reversal of 1376783397609 is 9067933876731.

It is not a de Polignac number, because 1376783397609 - 2³ = 1376783397601 is a prime.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (1376783397601) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 4733634 + ... + 5016059.

It is an arithmetic number, because the mean of its divisors is an integer number (116099356152).

Almost surely, 2^{1376783397609} is an apocalyptic number.

It is an amenable number.

1376783397609 is a deficient number, since it is larger than the sum of its proper divisors (480806300823).

1376783397609 is a wasteful number, since it uses less digits than its factorization.

1376783397609 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9750256.

The product of its (nonzero) digits is 216040608, while the sum is 69.

The spelling of 1376783397609 in words is "one trillion, three hundred seventy-six billion, seven hundred eighty-three million, three hundred ninety-seven thousand, six hundred nine".