55185037191 has 12 divisors (see below), whose sum is σ = 79765928320. Its totient is φ = 36765005760.

The previous prime is 55185037123. The next prime is 55185037211. The reversal of 55185037191 is 19173058155.

55185037191 is a `hidden beast` number, since 5 + 51 + 8 + 503 + 7 + 1 + 91 = 666.

It is not a de Polignac number, because 55185037191 - 2¹³ = 55185028999 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (55185037121) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 2070946 + ... + 2097423.

Almost surely, 2^55185037191 is an apocalyptic number.

55185037191 is a deficient number, since it is larger than the sum of its proper divisors (24580891129).

55185037191 is a wasteful number, since it uses less digits than its factorization.

55185037191 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4169846 (or 4169843 counting only the distinct ones).

The product of its (nonzero) digits is 189000, while the sum is 45.

The spelling of 55185037191 in words is "fifty-five billion, one hundred eighty-five million, thirty-seven thousand, one hundred ninety-one".