55177238191 has 2 divisors, whose sum is σ = 55177238192. Its totient is φ = 55177238190.

The previous prime is 55177238183. The next prime is 55177238219. The reversal of 55177238191 is 19183277155.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 55177238191 - 2³ = 55177238183 is a prime.

It is a super-2 number, since 2×55177238191² (a number of 22 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (55177238101) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 27588619095 + 27588619096.

It is an arithmetic number, because the mean of its divisors is an integer number (27588619096).

Almost surely, 2^55177238191 is an apocalyptic number.

55177238191 is a deficient number, since it is larger than the sum of its proper divisors (1).

55177238191 is an equidigital number, since it uses as much as digits as its factorization.

55177238191 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 529200, while the sum is 49.

The spelling of 55177238191 in words is "fifty-five billion, one hundred seventy-seven million, two hundred thirty-eight thousand, one hundred ninety-one".