55530577961 has 2 divisors, whose sum is σ = 55530577962. Its totient is φ = 55530577960.

The previous prime is 55530577951. The next prime is 55530578009. The reversal of 55530577961 is 16977503555.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 48600847936 + 6929730025 = 220456^2 + 83245^2 .

It is a cyclic number.

It is not a de Polignac number, because 55530577961 - 2⁶ = 55530577897 is a prime.

It is not a weakly prime, because it can be changed into another prime (55530577951) 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, 27765288980 + 27765288981.

It is an arithmetic number, because the mean of its divisors is an integer number (27765288981).

Almost surely, 2^55530577961 is an apocalyptic number.

It is an amenable number.

55530577961 is a deficient number, since it is larger than the sum of its proper divisors (1).

55530577961 is an equidigital number, since it uses as much as digits as its factorization.

55530577961 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 4961250, while the sum is 53.

The spelling of 55530577961 in words is "fifty-five billion, five hundred thirty million, five hundred seventy-seven thousand, nine hundred sixty-one".