55745161081 has 2 divisors, whose sum is σ = 55745161082. Its totient is φ = 55745161080.

The previous prime is 55745161063. The next prime is 55745161201. The reversal of 55745161081 is 18016154755.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 49691543056 + 6053618025 = 222916^2 + 77805^2 .

It is a cyclic number.

It is not a de Polignac number, because 55745161081 - 2⁵ = 55745161049 is a prime.

It is a super-2 number, since 2×55745161081² (a number of 22 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (55745161051) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 27872580540 + 27872580541.

It is an arithmetic number, because the mean of its divisors is an integer number (27872580541).

Almost surely, 2^55745161081 is an apocalyptic number.

It is an amenable number.

55745161081 is a deficient number, since it is larger than the sum of its proper divisors (1).

55745161081 is an equidigital number, since it uses as much as digits as its factorization.

55745161081 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 168000, while the sum is 43.

The spelling of 55745161081 in words is "fifty-five billion, seven hundred forty-five million, one hundred sixty-one thousand, eighty-one".