55800777 has 16 divisors (see below), whose sum is σ = 78493760. Its totient is φ = 35163072.

The previous prime is 55800769. The next prime is 55800793. The reversal of 55800777 is 77700855.

It is not a de Polignac number, because 55800777 - 2³ = 55800769 is a prime.

It is a super-2 number, since 2×55800777² = 6227453427607458, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (55800377) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 34143 + ... + 35739.

It is an arithmetic number, because the mean of its divisors is an integer number (4905860).

Almost surely, 2^55800777 is an apocalyptic number.

55800777 is a gapful number since it is divisible by the number (57) formed by its first and last digit.

It is an amenable number.

55800777 is a deficient number, since it is larger than the sum of its proper divisors (22692983).

55800777 is a wasteful number, since it uses less digits than its factorization.

55800777 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2232.

The product of its (nonzero) digits is 68600, while the sum is 39.

The square root of 55800777 is about 7469.9917670637. The cubic root of 55800777 is about 382.1320071353.

The spelling of 55800777 in words is "fifty-five million, eight hundred thousand, seven hundred seventy-seven".