55056166381897 has 2 divisors, whose sum is σ = 55056166381898. Its totient is φ = 55056166381896.

The previous prime is 55056166381847. The next prime is 55056166381943. The reversal of 55056166381897 is 79818366165055.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 47933758343241 + 7122408038656 = 6923421^2 + 2668784^2 .

It is a cyclic number.

It is not a de Polignac number, because 55056166381897 - 2²⁷ = 55056032164169 is a prime.

It is a super-2 number, since 2×55056166381897² (a number of 28 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (55056166381847) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 27528083190948 + 27528083190949.

It is an arithmetic number, because the mean of its divisors is an integer number (27528083190949).

Almost surely, 2^{55056166381897} is an apocalyptic number.

It is an amenable number.

55056166381897 is a deficient number, since it is larger than the sum of its proper divisors (1).

55056166381897 is an equidigital number, since it uses as much as digits as its factorization.

55056166381897 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 326592000, while the sum is 70.

The spelling of 55056166381897 in words is "fifty-five trillion, fifty-six billion, one hundred sixty-six million, three hundred eighty-one thousand, eight hundred ninety-seven".