51100165410661 has 8 divisors (see below), whose sum is σ = 52383040285464. Its totient is φ = 49819030030080.

The previous prime is 51100165410647. The next prime is 51100165410667. The reversal of 51100165410661 is 16601456100115.

It can be written as a sum of positive squares in 4 ways, for example, as 9908607066436 + 41191558344225 = 3147794^2 + 6418065^2 .

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 51100165410661 - 2⁷ = 51100165410533 is a prime.

It is a super-2 number, since 2×51100165410661² (a number of 28 digits) contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 51100165410661.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (51100165410667) 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, 434814066 + ... + 434931571.

It is an arithmetic number, because the mean of its divisors is an integer number (6547880035683).

Almost surely, 2^{51100165410661} is an apocalyptic number.

It is an amenable number.

51100165410661 is a deficient number, since it is larger than the sum of its proper divisors (1282874874803).

51100165410661 is a wasteful number, since it uses less digits than its factorization.

51100165410661 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 869747111.

The product of its (nonzero) digits is 21600, while the sum is 37.

The spelling of 51100165410661 in words is "fifty-one trillion, one hundred billion, one hundred sixty-five million, four hundred ten thousand, six hundred sixty-one".