54406890569 has 2 divisors, whose sum is σ = 54406890570. Its totient is φ = 54406890568.

The previous prime is 54406890557. The next prime is 54406890647. The reversal of 54406890569 is 96509860445.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 54154874944 + 252015625 = 232712^2 + 15875^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-54406890569 is a prime.

It is a super-2 number, since 2×54406890569² (a number of 22 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (54406890539) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 27203445284 + 27203445285.

It is an arithmetic number, because the mean of its divisors is an integer number (27203445285).

Almost surely, 2^54406890569 is an apocalyptic number.

It is an amenable number.

54406890569 is a deficient number, since it is larger than the sum of its proper divisors (1).

54406890569 is an equidigital number, since it uses as much as digits as its factorization.

54406890569 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 9331200, while the sum is 56.

The spelling of 54406890569 in words is "fifty-four billion, four hundred six million, eight hundred ninety thousand, five hundred sixty-nine".