55261177481 has 2 divisors, whose sum is σ = 55261177482. Its totient is φ = 55261177480.

The previous prime is 55261177403. The next prime is 55261177501. The reversal of 55261177481 is 18477116255.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 51719856400 + 3541321081 = 227420^2 + 59509^2 .

It is a cyclic number.

It is not a de Polignac number, because 55261177481 - 2³⁴ = 38081308297 is a prime.

It is a super-2 number, since 2×55261177481² (a number of 22 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (55261174481) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 27630588740 + 27630588741.

It is an arithmetic number, because the mean of its divisors is an integer number (27630588741).

Almost surely, 2^55261177481 is an apocalyptic number.

It is an amenable number.

55261177481 is a deficient number, since it is larger than the sum of its proper divisors (1).

55261177481 is an equidigital number, since it uses as much as digits as its factorization.

55261177481 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 470400, while the sum is 47.

The spelling of 55261177481 in words is "fifty-five billion, two hundred sixty-one million, one hundred seventy-seven thousand, four hundred eighty-one".