557655641405321 has 4 divisors (see below), whose sum is σ = 558334880920644. Its totient is φ = 556976401890000.

The previous prime is 557655641405243. The next prime is 557655641405329. The reversal of 557655641405321 is 123504146556755.

It is a happy number.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 85879865245321 + 471775776160000 = 9267139^2 + 21720400^2 .

It is a cyclic number.

It is not a de Polignac number, because 557655641405321 - 2²² = 557655637211017 is a prime.

It is a super-2 number, since 2×557655641405321² (a number of 30 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (557655641405329) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (29) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 339619756430 + ... + 339619758071.

It is an arithmetic number, because the mean of its divisors is an integer number (139583720230161).

Almost surely, 2^{557655641405321} is an apocalyptic number.

It is an amenable number.

557655641405321 is a deficient number, since it is larger than the sum of its proper divisors (679239515323).

557655641405321 is an equidigital number, since it uses as much as digits as its factorization.

557655641405321 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 679239515322.

The product of its (nonzero) digits is 75600000, while the sum is 59.

The spelling of 557655641405321 in words is "five hundred fifty-seven trillion, six hundred fifty-five billion, six hundred forty-one million, four hundred five thousand, three hundred twenty-one".