61752215389 has 2 divisors, whose sum is σ = 61752215390. Its totient is φ = 61752215388.

The previous prime is 61752215353. The next prime is 61752215417. The reversal of 61752215389 is 98351225716.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 54923672164 + 6828543225 = 234358^2 + 82635^2 .

It is a cyclic number.

It is not a de Polignac number, because 61752215389 - 2¹⁹ = 61751691101 is a prime.

It is a super-2 number, since 2×61752215389² (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 (61752215089) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 30876107694 + 30876107695.

It is an arithmetic number, because the mean of its divisors is an integer number (30876107695).

Almost surely, 2^61752215389 is an apocalyptic number.

It is an amenable number.

61752215389 is a deficient number, since it is larger than the sum of its proper divisors (1).

61752215389 is an equidigital number, since it uses as much as digits as its factorization.

61752215389 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 907200, while the sum is 49.

The spelling of 61752215389 in words is "sixty-one billion, seven hundred fifty-two million, two hundred fifteen thousand, three hundred eighty-nine".