55995489409 has 2 divisors, whose sum is σ = 55995489410. Its totient is φ = 55995489408.

The previous prime is 55995489371. The next prime is 55995489413. The reversal of 55995489409 is 90498459955.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 30856435600 + 25139053809 = 175660^2 + 158553^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-55995489409 is a prime.

It is a super-3 number, since 3×55995489409³ (a number of 33 digits) contains 333 as substring.

It is not a weakly prime, because it can be changed into another prime (55995489449) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 27997744704 + 27997744705.

It is an arithmetic number, because the mean of its divisors is an integer number (27997744705).

Almost surely, 2^55995489409 is an apocalyptic number.

It is an amenable number.

55995489409 is a deficient number, since it is larger than the sum of its proper divisors (1).

55995489409 is an equidigital number, since it uses as much as digits as its factorization.

55995489409 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 104976000, while the sum is 67.

The spelling of 55995489409 in words is "fifty-five billion, nine hundred ninety-five million, four hundred eighty-nine thousand, four hundred nine".