61055555959 has 2 divisors, whose sum is σ = 61055555960. Its totient is φ = 61055555958.

The previous prime is 61055555927. The next prime is 61055556043. The reversal of 61055555959 is 95955555016.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 61055555959 - 2⁵ = 61055555927 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (61055552959) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 30527777979 + 30527777980.

It is an arithmetic number, because the mean of its divisors is an integer number (30527777980).

Almost surely, 2^61055555959 is an apocalyptic number.

61055555959 is a deficient number, since it is larger than the sum of its proper divisors (1).

61055555959 is an equidigital number, since it uses as much as digits as its factorization.

61055555959 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 7593750, while the sum is 55.

The spelling of 61055555959 in words is "sixty-one billion, fifty-five million, five hundred fifty-five thousand, nine hundred fifty-nine".