55503027780157 has 2 divisors, whose sum is σ = 55503027780158. Its totient is φ = 55503027780156.

The previous prime is 55503027780149. The next prime is 55503027780323. The reversal of 55503027780157 is 75108772030555.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 37657294994916 + 17845732785241 = 6136554^2 + 4224421^2 .

It is a cyclic number.

It is not a de Polignac number, because 55503027780157 - 2³ = 55503027780149 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 55503027780098 and 55503027780107.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (55503027780127) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 27751513890078 + 27751513890079.

It is an arithmetic number, because the mean of its divisors is an integer number (27751513890079).

Almost surely, 2^{55503027780157} is an apocalyptic number.

It is an amenable number.

55503027780157 is a deficient number, since it is larger than the sum of its proper divisors (1).

55503027780157 is an equidigital number, since it uses as much as digits as its factorization.

55503027780157 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 10290000, while the sum is 55.

The spelling of 55503027780157 in words is "fifty-five trillion, five hundred three billion, twenty-seven million, seven hundred eighty thousand, one hundred fifty-seven".