51139291200 has 336 divisors, whose sum is σ = 179920270080. Its totient is φ = 12670894080.

The previous prime is 51139291171. The next prime is 51139291243. The reversal of 51139291200 is 219293115.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 6442434 + ... + 6450366.

Almost surely, 2^51139291200 is an apocalyptic number.

51139291200 is a gapful number since it is divisible by the number (50) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 51139291200, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (89960135040).

51139291200 is an abundant number, since it is smaller than the sum of its proper divisors (128780978880).

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

51139291200 is a wasteful number, since it uses less digits than its factorization.

51139291200 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8054 (or 8039 counting only the distinct ones).

The product of its (nonzero) digits is 4860, while the sum is 33.

The spelling of 51139291200 in words is "fifty-one billion, one hundred thirty-nine million, two hundred ninety-one thousand, two hundred".