61208660479 has 2 divisors, whose sum is σ = 61208660480. Its totient is φ = 61208660478.

The previous prime is 61208660459. The next prime is 61208660521. The reversal of 61208660479 is 97406680216.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 61208660479 - 2¹³ = 61208652287 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (61208660449) 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, 30604330239 + 30604330240.

It is an arithmetic number, because the mean of its divisors is an integer number (30604330240).

Almost surely, 2^61208660479 is an apocalyptic number.

61208660479 is a deficient number, since it is larger than the sum of its proper divisors (1).

61208660479 is an equidigital number, since it uses as much as digits as its factorization.

61208660479 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 870912, while the sum is 49.

The spelling of 61208660479 in words is "sixty-one billion, two hundred eight million, six hundred sixty thousand, four hundred seventy-nine".