61224480509 has 2 divisors, whose sum is σ = 61224480510. Its totient is φ = 61224480508.

The previous prime is 61224480371. The next prime is 61224480521. The reversal of 61224480509 is 90508442216.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 57943711225 + 3280769284 = 240715^2 + 57278^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-61224480509 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (61224480589) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 30612240254 + 30612240255.

It is an arithmetic number, because the mean of its divisors is an integer number (30612240255).

Almost surely, 2^61224480509 is an apocalyptic number.

It is an amenable number.

61224480509 is a deficient number, since it is larger than the sum of its proper divisors (1).

61224480509 is an equidigital number, since it uses as much as digits as its factorization.

61224480509 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 138240, while the sum is 41.

The spelling of 61224480509 in words is "sixty-one billion, two hundred twenty-four million, four hundred eighty thousand, five hundred nine".