51901803072 has 336 divisors, whose sum is σ = 176049748992. Its totient is φ = 14306181120.

The previous prime is 51901803067. The next prime is 51901803143. The reversal of 51901803072 is 27030810915.

It is a tau number, because it is divible by the number of its divisors (336).

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

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, 77119728 + ... + 77120400.

Almost surely, 2^51901803072 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 51901803072, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (88024874496).

51901803072 is an abundant number, since it is smaller than the sum of its proper divisors (124147945920).

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

51901803072 is a wasteful number, since it uses less digits than its factorization.

51901803072 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1346 (or 1333 counting only the distinct ones).

The product of its (nonzero) digits is 15120, while the sum is 36.

The spelling of 51901803072 in words is "fifty-one billion, nine hundred one million, eight hundred three thousand, seventy-two".