51138167308 has 12 divisors (see below), whose sum is σ = 89705379960. Its totient is φ = 25508058752.

The previous prime is 51138167287. The next prime is 51138167309. The reversal of 51138167308 is 80376183115.

It is a super-2 number, since 2×51138167308² (a number of 22 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (51138167309) by changing a digit.

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 in 3 ways as a sum of consecutive naturals, for example, 15254341 + ... + 15257692.

It is an arithmetic number, because the mean of its divisors is an integer number (7475448330).

Almost surely, 2^51138167308 is an apocalyptic number.

It is an amenable number.

51138167308 is a deficient number, since it is larger than the sum of its proper divisors (38567212652).

51138167308 is a wasteful number, since it uses less digits than its factorization.

51138167308 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 30512456 (or 30512454 counting only the distinct ones).

The product of its (nonzero) digits is 120960, while the sum is 43.

The spelling of 51138167308 in words is "fifty-one billion, one hundred thirty-eight million, one hundred sixty-seven thousand, three hundred eight".