61371927413 has 2 divisors, whose sum is σ = 61371927414. Its totient is φ = 61371927412.

The previous prime is 61371927389. The next prime is 61371927473. The reversal of 61371927413 is 31472917316.

61371927413 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 53635317649 + 7736609764 = 231593^2 + 87958^2 .

It is a cyclic number.

It is not a de Polignac number, because 61371927413 - 2¹² = 61371923317 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (61371927473) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 30685963706 + 30685963707.

It is an arithmetic number, because the mean of its divisors is an integer number (30685963707).

Almost surely, 2^61371927413 is an apocalyptic number.

It is an amenable number.

61371927413 is a deficient number, since it is larger than the sum of its proper divisors (1).

61371927413 is an equidigital number, since it uses as much as digits as its factorization.

61371927413 is an evil number, because the sum of its binary digits is even.

The product of its digits is 190512, while the sum is 44.

The spelling of 61371927413 in words is "sixty-one billion, three hundred seventy-one million, nine hundred twenty-seven thousand, four hundred thirteen".