61223351129 has 2 divisors, whose sum is σ = 61223351130. Its totient is φ = 61223351128.

The previous prime is 61223351099. The next prime is 61223351153. The reversal of 61223351129 is 92115332216.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 60791833600 + 431517529 = 246560^2 + 20773^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-61223351129 is a prime.

It is not a weakly prime, because it can be changed into another prime (61223351029) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 30611675564 + 30611675565.

It is an arithmetic number, because the mean of its divisors is an integer number (30611675565).

Almost surely, 2^61223351129 is an apocalyptic number.

It is an amenable number.

61223351129 is a deficient number, since it is larger than the sum of its proper divisors (1).

61223351129 is an equidigital number, since it uses as much as digits as its factorization.

61223351129 is an evil number, because the sum of its binary digits is even.

The product of its digits is 19440, while the sum is 35.

The spelling of 61223351129 in words is "sixty-one billion, two hundred twenty-three million, three hundred fifty-one thousand, one hundred twenty-nine".