61318229893 has 2 divisors, whose sum is σ = 61318229894. Its totient is φ = 61318229892.

The previous prime is 61318229873. The next prime is 61318229933. The reversal of 61318229893 is 39892281316.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 60893952289 + 424277604 = 246767^2 + 20598^2 .

It is a cyclic number.

It is not a de Polignac number, because 61318229893 - 2⁹ = 61318229381 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 61318229893.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (61318229873) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 30659114946 + 30659114947.

It is an arithmetic number, because the mean of its divisors is an integer number (30659114947).

Almost surely, 2^61318229893 is an apocalyptic number.

It is an amenable number.

61318229893 is a deficient number, since it is larger than the sum of its proper divisors (1).

61318229893 is an equidigital number, since it uses as much as digits as its factorization.

61318229893 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1119744, while the sum is 52.

The spelling of 61318229893 in words is "sixty-one billion, three hundred eighteen million, two hundred twenty-nine thousand, eight hundred ninety-three".