51543543412 has 6 divisors (see below), whose sum is σ = 90201200978. Its totient is φ = 25771771704.

The previous prime is 51543543407. The next prime is 51543543427. The reversal of 51543543412 is 21434534515.

It can be written as a sum of positive squares in only one way, i.e., 50645702116 + 897841296 = 225046^2 + 29964^2 .

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6442942923 + ... + 6442942930.

Almost surely, 2^51543543412 is an apocalyptic number.

It is an amenable number.

51543543412 is a deficient number, since it is larger than the sum of its proper divisors (38657657566).

51543543412 is a wasteful number, since it uses less digits than its factorization.

51543543412 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12885885857 (or 12885885855 counting only the distinct ones).

The product of its digits is 144000, while the sum is 37.

The spelling of 51543543412 in words is "fifty-one billion, five hundred forty-three million, five hundred forty-three thousand, four hundred twelve".