51693663941504 has 512 divisors, whose sum is σ = 122656197888000. Its totient is φ = 21493334016000.

The previous prime is 51693663941443. The next prime is 51693663941581. The reversal of 51693663941504 is 40514936639615.

It is a congruent number.

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, 8191038509 + ... + 8191044819.

It is an arithmetic number, because the mean of its divisors is an integer number (239562886500).

Almost surely, 2^{51693663941504} 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 51693663941504, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (61328098944000).

51693663941504 is an abundant number, since it is smaller than the sum of its proper divisors (70962533946496).

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

51693663941504 is a wasteful number, since it uses less digits than its factorization.

51693663941504 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6558 (or 6546 counting only the distinct ones).

The product of its (nonzero) digits is 62985600, while the sum is 62.

The spelling of 51693663941504 in words is "fifty-one trillion, six hundred ninety-three billion, six hundred sixty-three million, nine hundred forty-one thousand, five hundred four".