5577621691 has 2 divisors, whose sum is σ = 5577621692. Its totient is φ = 5577621690.

The previous prime is 5577621689. The next prime is 5577621737. The reversal of 5577621691 is 1961267755.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 5577621691 - 2¹ = 5577621689 is a prime.

It is a super-2 number, since 2×5577621691² = 62219727455827398962, which contains 22 as substring.

Together with 5577621689, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (5577621611) 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, 2788810845 + 2788810846.

It is an arithmetic number, because the mean of its divisors is an integer number (2788810846).

Almost surely, 2^5577621691 is an apocalyptic number.

5577621691 is a deficient number, since it is larger than the sum of its proper divisors (1).

5577621691 is an equidigital number, since it uses as much as digits as its factorization.

5577621691 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 793800, while the sum is 49.

The square root of 5577621691 is about 74683.4766933088. The cubic root of 5577621691 is about 1773.4393943865.

The spelling of 5577621691 in words is "five billion, five hundred seventy-seven million, six hundred twenty-one thousand, six hundred ninety-one".