61707364189 has 2 divisors, whose sum is σ = 61707364190. Its totient is φ = 61707364188.

The previous prime is 61707364157. The next prime is 61707364249. The reversal of 61707364189 is 98146370716.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 46401468100 + 15305896089 = 215410^2 + 123717^2 .

It is a cyclic number.

It is not a de Polignac number, because 61707364189 - 2⁵ = 61707364157 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (61701364189) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 30853682094 + 30853682095.

It is an arithmetic number, because the mean of its divisors is an integer number (30853682095).

Almost surely, 2^61707364189 is an apocalyptic number.

It is an amenable number.

61707364189 is a deficient number, since it is larger than the sum of its proper divisors (1).

61707364189 is an equidigital number, since it uses as much as digits as its factorization.

61707364189 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1524096, while the sum is 52.

The spelling of 61707364189 in words is "sixty-one billion, seven hundred seven million, three hundred sixty-four thousand, one hundred eighty-nine".