1578386423952 has 120 divisors (see below), whose sum is σ = 4764845098104. Its totient is φ = 484864745472.

The previous prime is 1578386423917. The next prime is 1578386424079. The reversal of 1578386423952 is 2593246838751.

1578386423952 is a `hidden beast` number, since 1 + 5 + 7 + 83 + 86 + 423 + 9 + 52 = 666.

It can be written as a sum of positive squares in 4 ways, for example, as 101490667776 + 1476895756176 = 318576^2 + 1215276^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 1578386423952.

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, 459808 + ... + 1835264.

Almost surely, 2^{1578386423952} is an apocalyptic number.

1578386423952 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 1578386423952, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2382422549052).

1578386423952 is an abundant number, since it is smaller than the sum of its proper divisors (3186458674152).

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

1578386423952 is a wasteful number, since it uses less digits than its factorization.

1578386423952 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1376097 (or 1376088 counting only the distinct ones).

The product of its digits is 87091200, while the sum is 63.

The spelling of 1578386423952 in words is "one trillion, five hundred seventy-eight billion, three hundred eighty-six million, four hundred twenty-three thousand, nine hundred fifty-two".