55561100006977 has 2 divisors, whose sum is σ = 55561100006978. Its totient is φ = 55561100006976.

The previous prime is 55561100006957. The next prime is 55561100007121. The reversal of 55561100006977 is 77960000116555.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 34621973793936 + 20939126213041 = 5884044^2 + 4575929^2 .

It is a cyclic number.

It is not a de Polignac number, because 55561100006977 - 2³⁵ = 55526740268609 is a prime.

It is not a weakly prime, because it can be changed into another prime (55561100006957) 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, 27780550003488 + 27780550003489.

It is an arithmetic number, because the mean of its divisors is an integer number (27780550003489).

Almost surely, 2^{55561100006977} is an apocalyptic number.

It is an amenable number.

55561100006977 is a deficient number, since it is larger than the sum of its proper divisors (1).

55561100006977 is an equidigital number, since it uses as much as digits as its factorization.

55561100006977 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1984500, while the sum is 52.

The spelling of 55561100006977 in words is "fifty-five trillion, five hundred sixty-one billion, one hundred million, six thousand, nine hundred seventy-seven".