1381618535 has 24 divisors (see below), whose sum is σ = 1918296240. Its totient is φ = 951920640.

The previous prime is 1381618519. The next prime is 1381618613. The reversal of 1381618535 is 5358161831.

It is not a de Polignac number, because 1381618535 - 2⁴ = 1381618519 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 1381618492 and 1381618501.

It is a congruent number.

It is an unprimeable number.

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 23 ways as a sum of consecutive naturals, for example, 48602 + ... + 71591.

It is an arithmetic number, because the mean of its divisors is an integer number (79929010).

Almost surely, 2^1381618535 is an apocalyptic number.

1381618535 is a deficient number, since it is larger than the sum of its proper divisors (536677705).

1381618535 is a wasteful number, since it uses less digits than its factorization.

1381618535 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 120239 (or 120228 counting only the distinct ones).

The product of its digits is 86400, while the sum is 41.

The square root of 1381618535 is about 37170.1296069842. The cubic root of 1381618535 is about 1113.7713708240.

It can be divided in two parts, 1381 and 618535, that added together give a palindrome (619916).

The spelling of 1381618535 in words is "one billion, three hundred eighty-one million, six hundred eighteen thousand, five hundred thirty-five".