61226902189 has 2 divisors, whose sum is σ = 61226902190. Its totient is φ = 61226902188.

The previous prime is 61226902153. The next prime is 61226902193. The reversal of 61226902189 is 98120962216.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 61140969289 + 85932900 = 247267^2 + 9270^2 .

It is a cyclic number.

It is not a de Polignac number, because 61226902189 - 2⁹ = 61226901677 is a prime.

It is a super-2 number, since 2×61226902189² (a number of 22 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (61226902889) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 30613451094 + 30613451095.

It is an arithmetic number, because the mean of its divisors is an integer number (30613451095).

Almost surely, 2^61226902189 is an apocalyptic number.

It is an amenable number.

61226902189 is a deficient number, since it is larger than the sum of its proper divisors (1).

61226902189 is an equidigital number, since it uses as much as digits as its factorization.

61226902189 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 186624, while the sum is 46.

The spelling of 61226902189 in words is "sixty-one billion, two hundred twenty-six million, nine hundred two thousand, one hundred eighty-nine".