61424665597 has 2 divisors, whose sum is σ = 61424665598. Its totient is φ = 61424665596.

The previous prime is 61424665583. The next prime is 61424665607. The reversal of 61424665597 is 79556642416.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 34182832996 + 27241832601 = 184886^2 + 165051^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-61424665597 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (61424665507) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 30712332798 + 30712332799.

It is an arithmetic number, because the mean of its divisors is an integer number (30712332799).

Almost surely, 2^61424665597 is an apocalyptic number.

It is an amenable number.

61424665597 is a deficient number, since it is larger than the sum of its proper divisors (1).

61424665597 is an equidigital number, since it uses as much as digits as its factorization.

61424665597 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 10886400, while the sum is 55.

The spelling of 61424665597 in words is "sixty-one billion, four hundred twenty-four million, six hundred sixty-five thousand, five hundred ninety-seven".