55777855 has 8 divisors (see below), whose sum is σ = 76495392. Its totient is φ = 38247648.

The previous prime is 55777853. The next prime is 55777859. The reversal of 55777855 is 55877755.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 55777855 - 2¹ = 55777853 is a prime.

It is a super-2 number, since 2×55777855² = 6222338216802050, which contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 55777799 and 55777808.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (55777853) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 796792 + ... + 796861.

It is an arithmetic number, because the mean of its divisors is an integer number (9561924).

Almost surely, 2^55777855 is an apocalyptic number.

55777855 is a deficient number, since it is larger than the sum of its proper divisors (20717537).

55777855 is a wasteful number, since it uses less digits than its factorization.

55777855 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1593665.

The product of its digits is 1715000, while the sum is 49.

The square root of 55777855 is about 7468.4573373622. The cubic root of 55777855 is about 382.0796755491.

The spelling of 55777855 in words is "fifty-five million, seven hundred seventy-seven thousand, eight hundred fifty-five".