55500605977 has 2 divisors, whose sum is σ = 55500605978. Its totient is φ = 55500605976.

The previous prime is 55500605933. The next prime is 55500606017. The reversal of 55500605977 is 77950600555.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 43858411776 + 11642194201 = 209424^2 + 107899^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-55500605977 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 55500605977.

It is not a weakly prime, because it can be changed into another prime (55500605077) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 27750302988 + 27750302989.

It is an arithmetic number, because the mean of its divisors is an integer number (27750302989).

Almost surely, 2^55500605977 is an apocalyptic number.

It is an amenable number.

55500605977 is a deficient number, since it is larger than the sum of its proper divisors (1).

55500605977 is an equidigital number, since it uses as much as digits as its factorization.

55500605977 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1653750, while the sum is 49.

The spelling of 55500605977 in words is "fifty-five billion, five hundred million, six hundred five thousand, nine hundred seventy-seven".