1381606487244 has 72 divisors (see below), whose sum is σ = 3537400819680. Its totient is φ = 454617453312.

The previous prime is 1381606487201. The next prime is 1381606487257. The reversal of 1381606487244 is 4427846061831.

1381606487244 is a `hidden beast` number, since 1 + 3 + 8 + 1 + 606 + 4 + 8 + 7 + 24 + 4 = 666.

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, 1612329 + ... + 2315775.

It is an arithmetic number, because the mean of its divisors is an integer number (49130566940).

Almost surely, 2^{1381606487244} 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 1381606487244, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1768700409840).

1381606487244 is an abundant number, since it is smaller than the sum of its proper divisors (2155794332436).

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

1381606487244 is a wasteful number, since it uses less digits than its factorization.

1381606487244 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 704159 (or 704154 counting only the distinct ones).

The product of its (nonzero) digits is 6193152, while the sum is 54.

The spelling of 1381606487244 in words is "one trillion, three hundred eighty-one billion, six hundred six million, four hundred eighty-seven thousand, two hundred forty-four".