1391918739504 has 160 divisors (see below), whose sum is σ = 3913021782720. Its totient is φ = 424572420096.

The previous prime is 1391918739493. The next prime is 1391918739527. The reversal of 1391918739504 is 4059378191931.

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, 43853112 + ... + 43884840.

It is an arithmetic number, because the mean of its divisors is an integer number (24456386142).

Almost surely, 2^{1391918739504} 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 1391918739504, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1956510891360).

1391918739504 is an abundant number, since it is smaller than the sum of its proper divisors (2521103043216).

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

1391918739504 is a wasteful number, since it uses less digits than its factorization.

1391918739504 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 33247 (or 33241 counting only the distinct ones).

The product of its (nonzero) digits is 7348320, while the sum is 60.

The spelling of 1391918739504 in words is "one trillion, three hundred ninety-one billion, nine hundred eighteen million, seven hundred thirty-nine thousand, five hundred four".