51266138112 has 416 divisors, whose sum is σ = 177397401600. Its totient is φ = 14325645312.

The previous prime is 51266138101. The next prime is 51266138117. The reversal of 51266138112 is 21183166215.

51266138112 is a `hidden beast` number, since 5 + 1 + 26 + 613 + 8 + 1 + 12 = 666.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is not an unprimeable number, because it can be changed into a prime (51266138117) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 36384064 + ... + 36385472.

Almost surely, 2^51266138112 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 51266138112, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (88698700800).

51266138112 is an abundant number, since it is smaller than the sum of its proper divisors (126131263488).

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

51266138112 is a wasteful number, since it uses less digits than its factorization.

51266138112 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1496 (or 1468 counting only the distinct ones).

The product of its digits is 17280, while the sum is 36.

The spelling of 51266138112 in words is "fifty-one billion, two hundred sixty-six million, one hundred thirty-eight thousand, one hundred twelve".