51106556601669 has 16 divisors (see below), whose sum is σ = 68212623564800. Its totient is φ = 34035768463536.

The previous prime is 51106556601623. The next prime is 51106556601673. The reversal of 51106556601669 is 96610665560115.

It is not a de Polignac number, because 51106556601669 - 2¹² = 51106556597573 is a prime.

It is a super-2 number, since 2×51106556601669² (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 not an unprimeable number, because it can be changed into a prime (51106556601619) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 42745992 + ... + 43925310.

It is an arithmetic number, because the mean of its divisors is an integer number (4263288972800).

Almost surely, 2^{51106556601669} is an apocalyptic number.

It is an amenable number.

51106556601669 is a deficient number, since it is larger than the sum of its proper divisors (17106066963131).

51106556601669 is a wasteful number, since it uses less digits than its factorization.

51106556601669 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1194264.

The product of its (nonzero) digits is 8748000, while the sum is 57.

The spelling of 51106556601669 in words is "fifty-one trillion, one hundred six billion, five hundred fifty-six million, six hundred one thousand, six hundred sixty-nine".