61713242819 has 2 divisors, whose sum is σ = 61713242820. Its totient is φ = 61713242818.

The previous prime is 61713242803. The next prime is 61713242837. The reversal of 61713242819 is 91824231716.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 61713242819 - 2⁴ = 61713242803 is a prime.

It is a super-2 number, since 2×61713242819² (a number of 22 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 61713242819.

It is not a weakly prime, because it can be changed into another prime (61713242519) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 30856621409 + 30856621410.

It is an arithmetic number, because the mean of its divisors is an integer number (30856621410).

Almost surely, 2^61713242819 is an apocalyptic number.

61713242819 is a deficient number, since it is larger than the sum of its proper divisors (1).

61713242819 is an equidigital number, since it uses as much as digits as its factorization.

61713242819 is an evil number, because the sum of its binary digits is even.

The product of its digits is 145152, while the sum is 44.

The spelling of 61713242819 in words is "sixty-one billion, seven hundred thirteen million, two hundred forty-two thousand, eight hundred nineteen".