1395386517840 has 160 divisors (see below), whose sum is σ = 4950190191360. Its totient is φ = 318523871232.

The previous prime is 1395386517829. The next prime is 1395386517913. The reversal of 1395386517840 is 487156835931.

It is a Harshad number since it is a multiple of its sum of digits (60).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 723156 + ... + 1820364.

It is an arithmetic number, because the mean of its divisors is an integer number (30938688696).

Almost surely, 2^{1395386517840} is an apocalyptic number.

1395386517840 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1395386517840, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2475095095680).

1395386517840 is an abundant number, since it is smaller than the sum of its proper divisors (3554803673520).

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

1395386517840 is a wasteful number, since it uses less digits than its factorization.

1395386517840 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1097989 (or 1097983 counting only the distinct ones).

The product of its (nonzero) digits is 21772800, while the sum is 60.

The spelling of 1395386517840 in words is "one trillion, three hundred ninety-five billion, three hundred eighty-six million, five hundred seventeen thousand, eight hundred forty".