5591691877 has 2 divisors, whose sum is σ = 5591691878. Its totient is φ = 5591691876.

The previous prime is 5591691871. The next prime is 5591691923. The reversal of 5591691877 is 7781961955.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 3924521316 + 1667170561 = 62646^2 + 40831^2 .

It is a cyclic number.

It is not a de Polignac number, because 5591691877 - 2²³ = 5583303269 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (5591691871) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2795845938 + 2795845939.

It is an arithmetic number, because the mean of its divisors is an integer number (2795845939).

Almost surely, 2^5591691877 is an apocalyptic number.

It is an amenable number.

5591691877 is a deficient number, since it is larger than the sum of its proper divisors (1).

5591691877 is an equidigital number, since it uses as much as digits as its factorization.

5591691877 is an evil number, because the sum of its binary digits is even.

The product of its digits is 4762800, while the sum is 58.

The square root of 5591691877 is about 74777.6161494869. The cubic root of 5591691877 is about 1774.9293764931.

The spelling of 5591691877 in words is "five billion, five hundred ninety-one million, six hundred ninety-one thousand, eight hundred seventy-seven".