61310550629 has 2 divisors, whose sum is σ = 61310550630. Its totient is φ = 61310550628.

The previous prime is 61310550619. The next prime is 61310550641. The reversal of 61310550629 is 92605501316.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 43013930404 + 18296620225 = 207398^2 + 135265^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-61310550629 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 61310550592 and 61310550601.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (61310550619) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 30655275314 + 30655275315.

It is an arithmetic number, because the mean of its divisors is an integer number (30655275315).

Almost surely, 2^61310550629 is an apocalyptic number.

It is an amenable number.

61310550629 is a deficient number, since it is larger than the sum of its proper divisors (1).

61310550629 is an equidigital number, since it uses as much as digits as its factorization.

61310550629 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 48600, while the sum is 38.

The spelling of 61310550629 in words is "sixty-one billion, three hundred ten million, five hundred fifty thousand, six hundred twenty-nine".