51101515665005 has 8 divisors (see below), whose sum is σ = 66038881782552. Its totient is φ = 37736503875648.

The previous prime is 51101515664987. The next prime is 51101515665017. The reversal of 51101515665005 is 50056651510115.

It can be written as a sum of positive squares in 4 ways, for example, as 2212067239204 + 48889448425801 = 1487302^2 + 6992099^2 .

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 51101515665005 - 2¹⁴ = 51101515648621 is a prime.

It is a super-2 number, since 2×51101515665005² (a number of 28 digits) contains 22 as substring.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (29) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 393088581974 + ... + 393088582103.

It is an arithmetic number, because the mean of its divisors is an integer number (8254860222819).

Almost surely, 2^{51101515665005} is an apocalyptic number.

It is an amenable number.

51101515665005 is a deficient number, since it is larger than the sum of its proper divisors (14937366117547).

51101515665005 is a wasteful number, since it uses less digits than its factorization.

51101515665005 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 786177164095.

The product of its (nonzero) digits is 112500, while the sum is 41.

The spelling of 51101515665005 in words is "fifty-one trillion, one hundred one billion, five hundred fifteen million, six hundred sixty-five thousand, five".