61772265020489 has 2 divisors, whose sum is σ = 61772265020490. Its totient is φ = 61772265020488.

The previous prime is 61772265020441. The next prime is 61772265020513. The reversal of 61772265020489 is 98402056227716.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 61584197953600 + 188067066889 = 7847560^2 + 433667^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-61772265020489 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is not a weakly prime, because it can be changed into another prime (61772265020189) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 30886132510244 + 30886132510245.

It is an arithmetic number, because the mean of its divisors is an integer number (30886132510245).

Almost surely, 2^{61772265020489} is an apocalyptic number.

It is an amenable number.

61772265020489 is a deficient number, since it is larger than the sum of its proper divisors (1).

61772265020489 is an equidigital number, since it uses as much as digits as its factorization.

61772265020489 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 20321280, while the sum is 59.

The spelling of 61772265020489 in words is "sixty-one trillion, seven hundred seventy-two billion, two hundred sixty-five million, twenty thousand, four hundred eighty-nine".