51523466255561 has 2 divisors, whose sum is σ = 51523466255562. Its totient is φ = 51523466255560.

The previous prime is 51523466255537. The next prime is 51523466255623. The reversal of 51523466255561 is 16555266432515.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 50031785089225 + 1491681166336 = 7073315^2 + 1221344^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-51523466255561 is a prime.

It is a super-3 number, since 3×51523466255561³ (a number of 42 digits) contains 333 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 51523466255497 and 51523466255506.

It is not a weakly prime, because it can be changed into another prime (51523466255531) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 25761733127780 + 25761733127781.

It is an arithmetic number, because the mean of its divisors is an integer number (25761733127781).

Almost surely, 2^{51523466255561} is an apocalyptic number.

It is an amenable number.

51523466255561 is a deficient number, since it is larger than the sum of its proper divisors (1).

51523466255561 is an equidigital number, since it uses as much as digits as its factorization.

51523466255561 is an evil number, because the sum of its binary digits is even.

The product of its digits is 32400000, while the sum is 56.

The spelling of 51523466255561 in words is "fifty-one trillion, five hundred twenty-three billion, four hundred sixty-six million, two hundred fifty-five thousand, five hundred sixty-one".