1364387128885 has 24 divisors (see below), whose sum is σ = 1905498966168. Its totient is φ = 933912038400.

The previous prime is 1364387128883. The next prime is 1364387128889. The reversal of 1364387128885 is 5888217834631.

It can be written as a sum of positive squares in 4 ways, for example, as 143278147441 + 1221108981444 = 378521^2 + 1105038^2 .

It is not a de Polignac number, because 1364387128885 - 2¹ = 1364387128883 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 (1364387128883) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 66318696 + ... + 66339265.

It is an arithmetic number, because the mean of its divisors is an integer number (79395790257).

Almost surely, 2^{1364387128885} is an apocalyptic number.

It is an amenable number.

1364387128885 is a deficient number, since it is larger than the sum of its proper divisors (541111837283).

1364387128885 is a wasteful number, since it uses less digits than its factorization.

1364387128885 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 132658005 (or 132657994 counting only the distinct ones).

The product of its digits is 61931520, while the sum is 64.

The spelling of 1364387128885 in words is "one trillion, three hundred sixty-four billion, three hundred eighty-seven million, one hundred twenty-eight thousand, eight hundred eighty-five".