51207051653 has 32 divisors (see below), whose sum is σ = 57034311264. Its totient is φ = 45769162752.

The previous prime is 51207051647. The next prime is 51207051667. The reversal of 51207051653 is 35615070215.

It can be written as a sum of positive squares in 16 ways, for example, as 87198244 + 51119853409 = 9338^2 + 226097^2 .

It is a cyclic number.

It is not a de Polignac number, because 51207051653 - 2¹² = 51207047557 is a prime.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (51207051683) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 4448201 + ... + 4459697.

It is an arithmetic number, because the mean of its divisors is an integer number (1782322227).

Almost surely, 2^51207051653 is an apocalyptic number.

It is an amenable number.

51207051653 is a deficient number, since it is larger than the sum of its proper divisors (5827259611).

51207051653 is a wasteful number, since it uses less digits than its factorization.

51207051653 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11721.

The product of its (nonzero) digits is 31500, while the sum is 35.

The spelling of 51207051653 in words is "fifty-one billion, two hundred seven million, fifty-one thousand, six hundred fifty-three".