55277757 has 12 divisors (see below), whose sum is σ = 80000284. Its totient is φ = 36780480.

The previous prime is 55277753. The next prime is 55277759. The reversal of 55277757 is 75777255.

55277757 is a `hidden beast` number, since 5 + 527 + 77 + 57 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 18481401 + 36796356 = 4299^2 + 6066^2 .

It is not a de Polignac number, because 55277757 - 2² = 55277753 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 (55277753) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 808 + ... + 10545.

Almost surely, 2^55277757 is an apocalyptic number.

It is an amenable number.

55277757 is a deficient number, since it is larger than the sum of its proper divisors (24722527).

55277757 is a wasteful number, since it uses less digits than its factorization.

55277757 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11900 (or 11897 counting only the distinct ones).

The product of its digits is 600250, while the sum is 45.

The square root of 55277757 is about 7434.9012770850. The cubic root of 55277757 is about 380.9343512243.

The spelling of 55277757 in words is "fifty-five million, two hundred seventy-seven thousand, seven hundred fifty-seven".