5545991761 has 2 divisors, whose sum is σ = 5545991762. Its totient is φ = 5545991760.

The previous prime is 5545991743. The next prime is 5545991797. The reversal of 5545991761 is 1671995455.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 4729175361 + 816816400 = 68769^2 + 28580^2 .

It is a cyclic number.

It is not a de Polignac number, because 5545991761 - 2⁹ = 5545991249 is a prime.

It is a super-2 number, since 2×5545991761² = 61516049226159762242, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 5545991699 and 5545991708.

It is not a weakly prime, because it can be changed into another prime (5545991861) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2772995880 + 2772995881.

It is an arithmetic number, because the mean of its divisors is an integer number (2772995881).

Almost surely, 2^5545991761 is an apocalyptic number.

It is an amenable number.

5545991761 is a deficient number, since it is larger than the sum of its proper divisors (1).

5545991761 is an equidigital number, since it uses as much as digits as its factorization.

5545991761 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1701000, while the sum is 52.

The square root of 5545991761 is about 74471.4157311381. The cubic root of 5545991761 is about 1770.0807267383.

The spelling of 5545991761 in words is "five billion, five hundred forty-five million, nine hundred ninety-one thousand, seven hundred sixty-one".