543112121554 has 4 divisors (see below), whose sum is σ = 814668182334. Its totient is φ = 271556060776.

The previous prime is 543112121543. The next prime is 543112121599. The reversal of 543112121554 is 455121211345.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 540791098225 + 2321023329 = 735385^2 + 48177^2 .

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 135778030387 + ... + 135778030390.

Almost surely, 2^543112121554 is an apocalyptic number.

543112121554 is a deficient number, since it is larger than the sum of its proper divisors (271556060780).

543112121554 is a wasteful number, since it uses less digits than its factorization.

543112121554 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 271556060779.

The product of its digits is 24000, while the sum is 34.

Adding to 543112121554 its reverse (455121211345), we get a palindrome (998233332899).

The spelling of 543112121554 in words is "five hundred forty-three billion, one hundred twelve million, one hundred twenty-one thousand, five hundred fifty-four".