61345545479 has 2 divisors, whose sum is σ = 61345545480. Its totient is φ = 61345545478.

The previous prime is 61345545433. The next prime is 61345545511. The reversal of 61345545479 is 97454554316.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-61345545479 is a prime.

It is a Sophie Germain prime.

It is a self number, because there is not a number n which added to its sum of digits gives 61345545479.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (61345545409) 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, 30672772739 + 30672772740.

It is an arithmetic number, because the mean of its divisors is an integer number (30672772740).

Almost surely, 2^61345545479 is an apocalyptic number.

61345545479 is a deficient number, since it is larger than the sum of its proper divisors (1).

61345545479 is an equidigital number, since it uses as much as digits as its factorization.

61345545479 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 9072000, while the sum is 53.

The spelling of 61345545479 in words is "sixty-one billion, three hundred forty-five million, five hundred forty-five thousand, four hundred seventy-nine".