1385656388887 has 4 divisors (see below), whose sum is σ = 1399375759176. Its totient is φ = 1371937018600.

The previous prime is 1385656388839. The next prime is 1385656388923. The reversal of 1385656388887 is 7888836565831.

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 1385656388887 - 2⁷ = 1385656388759 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 (1385656388807) 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, 6859684993 + ... + 6859685194.

It is an arithmetic number, because the mean of its divisors is an integer number (349843939794).

Almost surely, 2^{1385656388887} is an apocalyptic number.

1385656388887 is a deficient number, since it is larger than the sum of its proper divisors (13719370289).

1385656388887 is a wasteful number, since it uses less digits than its factorization.

1385656388887 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13719370288.

The product of its digits is 1857945600, while the sum is 76.

The spelling of 1385656388887 in words is "one trillion, three hundred eighty-five billion, six hundred fifty-six million, three hundred eighty-eight thousand, eight hundred eighty-seven".