51287744616 has 16 divisors (see below), whose sum is σ = 128219361600. Its totient is φ = 17095914864.

The previous prime is 51287744611. The next prime is 51287744633. The reversal of 51287744616 is 61644778215.

It is not an unprimeable number, because it can be changed into a prime (51287744611) 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 3 ways as a sum of consecutive naturals, for example, 1068494656 + ... + 1068494703.

It is an arithmetic number, because the mean of its divisors is an integer number (8013710100).

Almost surely, 2^51287744616 is an apocalyptic number.

It is an amenable number.

51287744616 is an abundant number, since it is smaller than the sum of its proper divisors (76931616984).

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

51287744616 is a wasteful number, since it uses less digits than its factorization.

51287744616 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2136989368 (or 2136989364 counting only the distinct ones).

The product of its digits is 2257920, while the sum is 51.

The spelling of 51287744616 in words is "fifty-one billion, two hundred eighty-seven million, seven hundred forty-four thousand, six hundred sixteen".