55641331406569 has 2 divisors, whose sum is σ = 55641331406570. Its totient is φ = 55641331406568.

The previous prime is 55641331406543. The next prime is 55641331406603. The reversal of 55641331406569 is 96560413314655.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 42625399188969 + 13015932217600 = 6528813^2 + 3607760^2 .

It is a cyclic number.

It is not a de Polignac number, because 55641331406569 - 2⁵ = 55641331406537 is a prime.

It is a super-2 number, since 2×55641331406569² (a number of 28 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (55641331406519) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 27820665703284 + 27820665703285.

It is an arithmetic number, because the mean of its divisors is an integer number (27820665703285).

Almost surely, 2^{55641331406569} is an apocalyptic number.

It is an amenable number.

55641331406569 is a deficient number, since it is larger than the sum of its proper divisors (1).

55641331406569 is an equidigital number, since it uses as much as digits as its factorization.

55641331406569 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 34992000, while the sum is 58.

The spelling of 55641331406569 in words is "fifty-five trillion, six hundred forty-one billion, three hundred thirty-one million, four hundred six thousand, five hundred sixty-nine".