51105660511205 has 16 divisors (see below), whose sum is σ = 61893083429760. Its totient is φ = 40507045558848.

The previous prime is 51105660511187. The next prime is 51105660511223. The reversal of 51105660511205 is 50211506650115.

It is an interprime number because it is at equal distance from previous prime (51105660511187) and next prime (51105660511223).

It is a cyclic number.

It is not a de Polignac number, because 51105660511205 - 2³⁰ = 51104586769381 is a prime.

It is a super-2 number, since 2×51105660511205² (a number of 28 digits) contains 22 as substring.

It is a Curzon number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 6480824 + ... + 12008846.

It is an arithmetic number, because the mean of its divisors is an integer number (3868317714360).

Almost surely, 2^{51105660511205} is an apocalyptic number.

It is an amenable number.

51105660511205 is a deficient number, since it is larger than the sum of its proper divisors (10787422918555).

51105660511205 is a wasteful number, since it uses less digits than its factorization.

51105660511205 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5545100.

The product of its (nonzero) digits is 45000, while the sum is 38.

The spelling of 51105660511205 in words is "fifty-one trillion, one hundred five billion, six hundred sixty million, five hundred eleven thousand, two hundred five".