61005100600421 has 2 divisors, whose sum is σ = 61005100600422. Its totient is φ = 61005100600420.

The previous prime is 61005100600397. The next prime is 61005100600501. The reversal of 61005100600421 is 12400600150016.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 42863719667521 + 18141380932900 = 6547039^2 + 4259270^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-61005100600421 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (61005100600321) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (29) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 30502550300210 + 30502550300211.

It is an arithmetic number, because the mean of its divisors is an integer number (30502550300211).

Almost surely, 2^{61005100600421} is an apocalyptic number.

It is an amenable number.

61005100600421 is a deficient number, since it is larger than the sum of its proper divisors (1).

61005100600421 is an equidigital number, since it uses as much as digits as its factorization.

61005100600421 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1440, while the sum is 26.

Adding to 61005100600421 its reverse (12400600150016), we get a palindrome (73405700750437).

The spelling of 61005100600421 in words is "sixty-one trillion, five billion, one hundred million, six hundred thousand, four hundred twenty-one".