51803784351640 has 32 divisors (see below), whose sum is σ = 117042160102560. Its totient is φ = 20635532352000.

The previous prime is 51803784351637. The next prime is 51803784351719. The reversal of 51803784351640 is 4615348730815.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2686908636 + ... + 2686927915.

It is an arithmetic number, because the mean of its divisors is an integer number (3657567503205).

Almost surely, 2^{51803784351640} is an apocalyptic number.

It is an amenable number.

51803784351640 is an abundant number, since it is smaller than the sum of its proper divisors (65238375750920).

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

51803784351640 is a wasteful number, since it uses less digits than its factorization.

51803784351640 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5373836803 (or 5373836799 counting only the distinct ones).

The product of its (nonzero) digits is 9676800, while the sum is 55.

The spelling of 51803784351640 in words is "fifty-one trillion, eight hundred three billion, seven hundred eighty-four million, three hundred fifty-one thousand, six hundred forty".