51380776500681 has 8 divisors (see below), whose sum is σ = 68507741398720. Its totient is φ = 34253831301552.

The previous prime is 51380776500643. The next prime is 51380776500721. The reversal of 51380776500681 is 18600567708315.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 51380776500681 - 2¹⁸ = 51380776238537 is a prime.

It is a super-3 number, since 3×51380776500681³ (a number of 42 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (51380776500631) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2968716 + ... + 10562898.

It is an arithmetic number, because the mean of its divisors is an integer number (8563467674840).

Almost surely, 2^{51380776500681} is an apocalyptic number.

It is an amenable number.

51380776500681 is a deficient number, since it is larger than the sum of its proper divisors (17126964898039).

51380776500681 is a wasteful number, since it uses less digits than its factorization.

51380776500681 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9849455.

The product of its (nonzero) digits is 8467200, while the sum is 57.

The spelling of 51380776500681 in words is "fifty-one trillion, three hundred eighty billion, seven hundred seventy-six million, five hundred thousand, six hundred eighty-one".