51411543653 has 2 divisors, whose sum is σ = 51411543654. Its totient is φ = 51411543652.

The previous prime is 51411543643. The next prime is 51411543727. The reversal of 51411543653 is 35634511415.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 25857283204 + 25554260449 = 160802^2 + 159857^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-51411543653 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (51411543643) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 25705771826 + 25705771827.

It is an arithmetic number, because the mean of its divisors is an integer number (25705771827).

Almost surely, 2^51411543653 is an apocalyptic number.

It is an amenable number.

51411543653 is a deficient number, since it is larger than the sum of its proper divisors (1).

51411543653 is an equidigital number, since it uses as much as digits as its factorization.

51411543653 is an evil number, because the sum of its binary digits is even.

The product of its digits is 108000, while the sum is 38.

The spelling of 51411543653 in words is "fifty-one billion, four hundred eleven million, five hundred forty-three thousand, six hundred fifty-three".