55451474224681 has 2 divisors, whose sum is σ = 55451474224682. Its totient is φ = 55451474224680.

The previous prime is 55451474224673. The next prime is 55451474224709. The reversal of 55451474224681 is 18642247415455.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 54127803265600 + 1323670959081 = 7357160^2 + 1150509^2 .

It is a cyclic number.

It is not a de Polignac number, because 55451474224681 - 2³ = 55451474224673 is a prime.

It is a super-2 number, since 2×55451474224681² (a number of 28 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (55451474224661) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 27725737112340 + 27725737112341.

It is an arithmetic number, because the mean of its divisors is an integer number (27725737112341).

Almost surely, 2^{55451474224681} is an apocalyptic number.

It is an amenable number.

55451474224681 is a deficient number, since it is larger than the sum of its proper divisors (1).

55451474224681 is an equidigital number, since it uses as much as digits as its factorization.

55451474224681 is an evil number, because the sum of its binary digits is even.

The product of its digits is 43008000, while the sum is 58.

The spelling of 55451474224681 in words is "fifty-five trillion, four hundred fifty-one billion, four hundred seventy-four million, two hundred twenty-four thousand, six hundred eighty-one".