55005166700381 has 2 divisors, whose sum is σ = 55005166700382. Its totient is φ = 55005166700380.

The previous prime is 55005166700327. The next prime is 55005166700411. The reversal of 55005166700381 is 18300766150055.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 50377827934756 + 4627338765625 = 7097734^2 + 2151125^2 .

It is a cyclic number.

It is not a de Polignac number, because 55005166700381 - 2¹⁸ = 55005166438237 is a prime.

It is a super-2 number, since 2×55005166700381² (a number of 28 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (55005166700581) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 27502583350190 + 27502583350191.

It is an arithmetic number, because the mean of its divisors is an integer number (27502583350191).

Almost surely, 2^{55005166700381} is an apocalyptic number.

It is an amenable number.

55005166700381 is a deficient number, since it is larger than the sum of its proper divisors (1).

55005166700381 is an equidigital number, since it uses as much as digits as its factorization.

55005166700381 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 756000, while the sum is 47.

The spelling of 55005166700381 in words is "fifty-five trillion, five billion, one hundred sixty-six million, seven hundred thousand, three hundred eighty-one".