1395139726864 has 120 divisors (see below), whose sum is σ = 2947745260800. Its totient is φ = 639361622016.

The previous prime is 1395139726829. The next prime is 1395139726913. The reversal of 1395139726864 is 4686279315931.

It is a junction number, because it is equal to n+sod(n) for n = 1395139726796 and 1395139726805.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 312599097 + ... + 312603559.

It is an arithmetic number, because the mean of its divisors is an integer number (24564543840).

Almost surely, 2^{1395139726864} is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1395139726864, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1473872630400).

1395139726864 is an abundant number, since it is smaller than the sum of its proper divisors (1552605533936).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1395139726864 is a wasteful number, since it uses less digits than its factorization.

1395139726864 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5289 (or 5270 counting only the distinct ones).

The product of its digits is 58786560, while the sum is 64.

The spelling of 1395139726864 in words is "one trillion, three hundred ninety-five billion, one hundred thirty-nine million, seven hundred twenty-six thousand, eight hundred sixty-four".