1387888082785 has 8 divisors (see below), whose sum is σ = 1665480914856. Its totient is φ = 1110300322560.

The previous prime is 1387888082771. The next prime is 1387888082807. The reversal of 1387888082785 is 5872808887831.

It can be written as a sum of positive squares in 4 ways, for example, as 576115914529 + 811772168256 = 759023^2 + 900984^2 .

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

It is not a de Polignac number, because 1387888082785 - 2³⁵ = 1353528344417 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 637434 + ... + 1783843.

It is an arithmetic number, because the mean of its divisors is an integer number (208185114357).

Almost surely, 2^{1387888082785} is an apocalyptic number.

It is an amenable number.

1387888082785 is a deficient number, since it is larger than the sum of its proper divisors (277592832071).

1387888082785 is a wasteful number, since it uses less digits than its factorization.

1387888082785 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2535923.

The product of its (nonzero) digits is 385351680, while the sum is 73.

The spelling of 1387888082785 in words is "one trillion, three hundred eighty-seven billion, eight hundred eighty-eight million, eighty-two thousand, seven hundred eighty-five".