1391839539552 has 1440 divisors, whose sum is σ = 5511499741440. Its totient is φ = 336259123200.

The previous prime is 1391839539521. The next prime is 1391839539631. The reversal of 1391839539552 is 2559359381931.

1391839539552 is a `hidden beast` number, since 1 + 3 + 9 + 18 + 39 + 5 + 39 + 552 = 666.

It is a Harshad number since it is a multiple of its sum of digits (63).

It is a self number, because there is not a number n which added to its sum of digits gives 1391839539552.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 239 ways as a sum of consecutive naturals, for example, 2544496143 + ... + 2544496689.

It is an arithmetic number, because the mean of its divisors is an integer number (3827430376).

Almost surely, 2^{1391839539552} is an apocalyptic number.

1391839539552 is a gapful number since it is divisible by the number (12) 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 1391839539552, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2755749870720).

1391839539552 is an abundant number, since it is smaller than the sum of its proper divisors (4119660201888).

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

1391839539552 is a wasteful number, since it uses less digits than its factorization.

1391839539552 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 678 (or 650 counting only the distinct ones).

The product of its digits is 39366000, while the sum is 63.

It can be divided in two parts, 1391839 and 539552, that added together give a palindrome (1931391).

The spelling of 1391839539552 in words is "one trillion, three hundred ninety-one billion, eight hundred thirty-nine million, five hundred thirty-nine thousand, five hundred fifty-two".