51903344640 has 832 divisors, whose sum is σ = 208347586560. Its totient is φ = 10758389760.

The previous prime is 51903344627. The next prime is 51903344707. The reversal of 51903344640 is 4644330915.

It is an unprimeable number.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 226652046 + ... + 226652274.

Almost surely, 2^51903344640 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 51903344640, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (104173793280).

51903344640 is an abundant number, since it is smaller than the sum of its proper divisors (156444241920).

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

51903344640 is a wasteful number, since it uses less digits than its factorization.

51903344640 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 316 (or 294 counting only the distinct ones).

The product of its (nonzero) digits is 155520, while the sum is 39.

The spelling of 51903344640 in words is "fifty-one billion, nine hundred three million, three hundred forty-four thousand, six hundred forty".