54180664169 has 2 divisors, whose sum is σ = 54180664170. Its totient is φ = 54180664168.

The previous prime is 54180664121. The next prime is 54180664193. The reversal of 54180664169 is 96146608145.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 32215942144 + 21964722025 = 179488^2 + 148205^2 .

It is a cyclic number.

It is not a de Polignac number, because 54180664169 - 2⁸ = 54180663913 is a prime.

It is a super-2 number, since 2×54180664169² (a number of 22 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (54180664969) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 27090332084 + 27090332085.

It is an arithmetic number, because the mean of its divisors is an integer number (27090332085).

Almost surely, 2^54180664169 is an apocalyptic number.

It is an amenable number.

54180664169 is a deficient number, since it is larger than the sum of its proper divisors (1).

54180664169 is an equidigital number, since it uses as much as digits as its factorization.

54180664169 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1244160, while the sum is 50.

The spelling of 54180664169 in words is "fifty-four billion, one hundred eighty million, six hundred sixty-four thousand, one hundred sixty-nine".