51140252412 has 18 divisors (see below), whose sum is σ = 129271193688. Its totient is φ = 17046750792.

The previous prime is 51140252381. The next prime is 51140252417. The reversal of 51140252412 is 21425204115.

It is a happy number.

51140252412 is a `hidden beast` number, since 5 + 11 + 402 + 5 + 241 + 2 = 666.

It is a tau number, because it is divible by the number of its divisors (18).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (51140252417) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 710281248 + ... + 710281319.

Almost surely, 2^51140252412 is an apocalyptic number.

It is an amenable number.

51140252412 is an abundant number, since it is smaller than the sum of its proper divisors (78130941276).

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

51140252412 is a wasteful number, since it uses less digits than its factorization.

51140252412 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1420562577 (or 1420562572 counting only the distinct ones).

The product of its (nonzero) digits is 3200, while the sum is 27.

Adding to 51140252412 its reverse (21425204115), we get a palindrome (72565456527).

The spelling of 51140252412 in words is "fifty-one billion, one hundred forty million, two hundred fifty-two thousand, four hundred twelve".