55277761 has 32 divisors (see below), whose sum is σ = 73785600. Its totient is φ = 40423680.

The previous prime is 55277759. The next prime is 55277777. The reversal of 55277761 is 16777255.

55277761 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 55277761 - 2¹ = 55277759 is a prime.

It is a super-2 number, since 2×55277761² = 6111261722346242, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (55277791) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 158215 + ... + 158563.

It is an arithmetic number, because the mean of its divisors is an integer number (2305800).

Almost surely, 2^55277761 is an apocalyptic number.

It is an amenable number.

55277761 is a deficient number, since it is larger than the sum of its proper divisors (18507839).

55277761 is a wasteful number, since it uses less digits than its factorization.

55277761 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 406 (or 384 counting only the distinct ones).

The product of its digits is 102900, while the sum is 40.

The square root of 55277761 is about 7434.9015460865. The cubic root of 55277761 is about 380.9343604127.

The spelling of 55277761 in words is "fifty-five million, two hundred seventy-seven thousand, seven hundred sixty-one".