1543742556844 has 12 divisors (see below), whose sum is σ = 2767440925368. Its totient is φ = 753045149600.

The previous prime is 1543742556821. The next prime is 1543742556877. The reversal of 1543742556844 is 4486552473451.

It is a happy number.

It is a super-2 number, since 2×1543742556844² (a number of 25 digits) contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4706532022 + ... + 4706532349.

It is an arithmetic number, because the mean of its divisors is an integer number (230620077114).

Almost surely, 2^{1543742556844} is an apocalyptic number.

It is an amenable number.

1543742556844 is a deficient number, since it is larger than the sum of its proper divisors (1223698368524).

1543742556844 is a wasteful number, since it uses less digits than its factorization.

1543742556844 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9413064416 (or 9413064414 counting only the distinct ones).

The product of its digits is 64512000, while the sum is 58.

The spelling of 1543742556844 in words is "one trillion, five hundred forty-three billion, seven hundred forty-two million, five hundred fifty-six thousand, eight hundred forty-four".