1378841728731 has 16 divisors (see below), whose sum is σ = 1845723724800. Its totient is φ = 915596494560.

The previous prime is 1378841728729. The next prime is 1378841728801. The reversal of 1378841728731 is 1378271488731.

It is not a de Polignac number, because 1378841728731 - 2¹ = 1378841728729 is a prime.

It is a super-2 number, since 2×1378841728731² (a number of 25 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (1378841728931) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1698261 + ... + 2375241.

It is an arithmetic number, because the mean of its divisors is an integer number (115357732800).

Almost surely, 2^{1378841728731} is an apocalyptic number.

1378841728731 is a deficient number, since it is larger than the sum of its proper divisors (466881996069).

1378841728731 is a wasteful number, since it uses less digits than its factorization.

1378841728731 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 679666.

The product of its digits is 12644352, while the sum is 60.

The spelling of 1378841728731 in words is "one trillion, three hundred seventy-eight billion, eight hundred forty-one million, seven hundred twenty-eight thousand, seven hundred thirty-one".