51812084545 has 16 divisors (see below), whose sum is σ = 69266025360. Its totient is φ = 36941877504.

The previous prime is 51812084537. The next prime is 51812084549. The reversal of 51812084545 is 54548021815.

It can be written as a sum of positive squares in 8 ways, for example, as 32626944 + 51779457601 = 5712^2 + 227551^2 .

It is a cyclic number.

It is not a de Polignac number, because 51812084545 - 2³ = 51812084537 is a prime.

It is not an unprimeable number, because it can be changed into a prime (51812084549) 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, 13741374 + ... + 13745143.

It is an arithmetic number, because the mean of its divisors is an integer number (4329126585).

Almost surely, 2^51812084545 is an apocalyptic number.

It is an amenable number.

51812084545 is a deficient number, since it is larger than the sum of its proper divisors (17453940815).

51812084545 is a wasteful number, since it uses less digits than its factorization.

51812084545 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 27486564.

The product of its (nonzero) digits is 256000, while the sum is 43.

The spelling of 51812084545 in words is "fifty-one billion, eight hundred twelve million, eighty-four thousand, five hundred forty-five".