51139272996 has 288 divisors, whose sum is σ = 166891898880. Its totient is φ = 13238748864.

The previous prime is 51139272991. The next prime is 51139273043. The reversal of 51139272996 is 69927293115.

51139272996 is a `hidden beast` number, since 511 + 39 + 2 + 7 + 2 + 9 + 96 = 666.

It is a Harshad number since it is a multiple of its sum of digits (54).

It is not an unprimeable number, because it can be changed into a prime (51139272991) by changing a digit.

It is a polite number, since it can be written in 95 ways as a sum of consecutive naturals, for example, 6272995 + ... + 6281141.

It is an arithmetic number, because the mean of its divisors is an integer number (579485760).

Almost surely, 2^51139272996 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 51139272996, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (83445949440).

51139272996 is an abundant number, since it is smaller than the sum of its proper divisors (115752625884).

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

51139272996 is a wasteful number, since it uses less digits than its factorization.

51139272996 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8228 (or 8201 counting only the distinct ones).

The product of its digits is 1837080, while the sum is 54.

The spelling of 51139272996 in words is "fifty-one billion, one hundred thirty-nine million, two hundred seventy-two thousand, nine hundred ninety-six".