51555160011001 has 2 divisors, whose sum is σ = 51555160011002. Its totient is φ = 51555160011000.

The previous prime is 51555160010983. The next prime is 51555160011079. The reversal of 51555160011001 is 10011006155515.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 50941037015401 + 614122995600 = 7137299^2 + 783660^2 .

It is a cyclic number.

It is not a de Polignac number, because 51555160011001 - 2¹³ = 51555160002809 is a prime.

It is not a weakly prime, because it can be changed into another prime (51555160011101) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (31) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 25777580005500 + 25777580005501.

It is an arithmetic number, because the mean of its divisors is an integer number (25777580005501).

Almost surely, 2^{51555160011001} is an apocalyptic number.

It is an amenable number.

51555160011001 is a deficient number, since it is larger than the sum of its proper divisors (1).

51555160011001 is an equidigital number, since it uses as much as digits as its factorization.

51555160011001 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 3750, while the sum is 31.

Adding to 51555160011001 its reverse (10011006155515), we get a palindrome (61566166166516).

The spelling of 51555160011001 in words is "fifty-one trillion, five hundred fifty-five billion, one hundred sixty million, eleven thousand, one".