61717943407123 has 2 divisors, whose sum is σ = 61717943407124. Its totient is φ = 61717943407122.

The previous prime is 61717943407067. The next prime is 61717943407171. The reversal of 61717943407123 is 32170434971716.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 61717943407123 - 2¹³ = 61717943398931 is a prime.

It is not a weakly prime, because it can be changed into another prime (61717943408123) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 30858971703561 + 30858971703562.

It is an arithmetic number, because the mean of its divisors is an integer number (30858971703562).

Almost surely, 2^{61717943407123} is an apocalyptic number.

61717943407123 is a deficient number, since it is larger than the sum of its proper divisors (1).

61717943407123 is an equidigital number, since it uses as much as digits as its factorization.

61717943407123 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 5334336, while the sum is 55.

The spelling of 61717943407123 in words is "sixty-one trillion, seven hundred seventeen billion, nine hundred forty-three million, four hundred seven thousand, one hundred twenty-three".