51134110878721 has 8 divisors (see below), whose sum is σ = 55068574576680. Its totient is φ = 47199800116992.

The previous prime is 51134110878671. The next prime is 51134110878733. The reversal of 51134110878721 is 12787801143115.

It can be written as a sum of positive squares in 4 ways, for example, as 4050703668496 + 47083407210225 = 2012636^2 + 6861735^2 .

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

It is a cyclic number.

It is not a de Polignac number, because 51134110878721 - 2⁹ = 51134110878209 is a prime.

It is a super-2 number, since 2×51134110878721² (a number of 28 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (51134110873721) 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, 37539166 + ... + 38877463.

It is an arithmetic number, because the mean of its divisors is an integer number (6883571822085).

Almost surely, 2^{51134110878721} is an apocalyptic number.

It is an amenable number.

51134110878721 is a deficient number, since it is larger than the sum of its proper divisors (3934463697959).

51134110878721 is a wasteful number, since it uses less digits than its factorization.

51134110878721 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 76468115.

The product of its (nonzero) digits is 376320, while the sum is 49.

The spelling of 51134110878721 in words is "fifty-one trillion, one hundred thirty-four billion, one hundred ten million, eight hundred seventy-eight thousand, seven hundred twenty-one".