55777085 has 32 divisors (see below), whose sum is σ = 87236352. Its totient is φ = 33223680.

The previous prime is 55777061. The next prime is 55777087. The reversal of 55777085 is 58077755.

It is not a de Polignac number, because 55777085 - 2⁶ = 55777021 is a prime.

It is a super-2 number, since 2×55777085² = 6222166422194450, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (55777087) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 4130 + ... + 11340.

It is an arithmetic number, because the mean of its divisors is an integer number (2726136).

Almost surely, 2^55777085 is an apocalyptic number.

It is an amenable number.

55777085 is a deficient number, since it is larger than the sum of its proper divisors (31459267).

55777085 is a wasteful number, since it uses less digits than its factorization.

55777085 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7253.

The product of its (nonzero) digits is 343000, while the sum is 44.

The square root of 55777085 is about 7468.4057870472. The cubic root of 55777085 is about 382.0779173680.

The spelling of 55777085 in words is "fifty-five million, seven hundred seventy-seven thousand, eighty-five".