1379256381687 has 8 divisors (see below), whose sum is σ = 1918965400704. Its totient is φ = 879525808568.

The previous prime is 1379256381683. The next prime is 1379256381689. The reversal of 1379256381687 is 7861836529731.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 1379256381687 - 2² = 1379256381683 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1379256381683) by changing a digit.

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 7 ways as a sum of consecutive naturals, for example, 9994611393 + ... + 9994611530.

It is an arithmetic number, because the mean of its divisors is an integer number (239870675088).

Almost surely, 2^{1379256381687} is an apocalyptic number.

1379256381687 is a deficient number, since it is larger than the sum of its proper divisors (539709019017).

1379256381687 is a wasteful number, since it uses less digits than its factorization.

1379256381687 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 19989222949.

The product of its digits is 91445760, while the sum is 66.

The spelling of 1379256381687 in words is "one trillion, three hundred seventy-nine billion, two hundred fifty-six million, three hundred eighty-one thousand, six hundred eighty-seven".