61783562413 has 2 divisors, whose sum is σ = 61783562414. Its totient is φ = 61783562412.

The previous prime is 61783562359. The next prime is 61783562443. The reversal of 61783562413 is 31426538716.

61783562413 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 61057421604 + 726140809 = 247098^2 + 26947^2 .

It is a cyclic number.

It is not a de Polignac number, because 61783562413 - 2¹⁷ = 61783431341 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (61783562443) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 30891781206 + 30891781207.

It is an arithmetic number, because the mean of its divisors is an integer number (30891781207).

Almost surely, 2^61783562413 is an apocalyptic number.

It is an amenable number.

61783562413 is a deficient number, since it is larger than the sum of its proper divisors (1).

61783562413 is an equidigital number, since it uses as much as digits as its factorization.

61783562413 is an evil number, because the sum of its binary digits is even.

The product of its digits is 725760, while the sum is 46.

The spelling of 61783562413 in words is "sixty-one billion, seven hundred eighty-three million, five hundred sixty-two thousand, four hundred thirteen".