1538706824442 has 16 divisors (see below), whose sum is σ = 3419348498880. Its totient is φ = 512902274796.

The previous prime is 1538706824429. The next prime is 1538706824443. The reversal of 1538706824442 is 2444286078351.

1538706824442 is a `hidden beast` number, since 1 + 53 + 8 + 70 + 6 + 82 + 4 + 442 = 666.

It is a super-2 number, since 2×1538706824442² (a number of 25 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (54), and also a Moran number because the ratio is a prime number: 28494570823 = 1538706824442 / (1 + 5 + 3 + 8 + 7 + 0 + 6 + 8 + 2 + 4 + 4 + 4 + 2).

It is not an unprimeable number, because it can be changed into a prime (1538706824443) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 14247285358 + ... + 14247285465.

It is an arithmetic number, because the mean of its divisors is an integer number (213709281180).

Almost surely, 2^{1538706824442} is an apocalyptic number.

1538706824442 is an abundant number, since it is smaller than the sum of its proper divisors (1880641674438).

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

1538706824442 is a wasteful number, since it uses less digits than its factorization.

1538706824442 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 28494570834 (or 28494570828 counting only the distinct ones).

The product of its (nonzero) digits is 10321920, while the sum is 54.

The spelling of 1538706824442 in words is "one trillion, five hundred thirty-eight billion, seven hundred six million, eight hundred twenty-four thousand, four hundred forty-two".