55177765177 has 4 divisors (see below), whose sum is σ = 56218855140. Its totient is φ = 54136675216.

The previous prime is 55177765169. The next prime is 55177765183. The reversal of 55177765177 is 77156777155.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 25709236281 + 29468528896 = 160341^2 + 171664^2 .

It is a cyclic number.

It is not a de Polignac number, because 55177765177 - 2³ = 55177765169 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (55177765127) 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 3 ways as a sum of consecutive naturals, for example, 520544902 + ... + 520545007.

It is an arithmetic number, because the mean of its divisors is an integer number (14054713785).

Almost surely, 2^55177765177 is an apocalyptic number.

It is an amenable number.

55177765177 is a deficient number, since it is larger than the sum of its proper divisors (1041089963).

55177765177 is a wasteful number, since it uses less digits than its factorization.

55177765177 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1041089962.

The product of its digits is 12605250, while the sum is 58.

The spelling of 55177765177 in words is "fifty-five billion, one hundred seventy-seven million, seven hundred sixty-five thousand, one hundred seventy-seven".