55577765 has 8 divisors (see below), whose sum is σ = 66766200. Its totient is φ = 44413632.

The previous prime is 55577719. The next prime is 55577789. The reversal of 55577765 is 56777555.

It can be written as a sum of positive squares in 4 ways, for example, as 9351364 + 46226401 = 3058^2 + 6799^2 .

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 55577765 - 2⁶ = 55577701 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 590 + ... + 10559.

It is an arithmetic number, because the mean of its divisors is an integer number (8345775).

Almost surely, 2^55577765 is an apocalyptic number.

It is an amenable number.

55577765 is a deficient number, since it is larger than the sum of its proper divisors (11188435).

55577765 is a wasteful number, since it uses less digits than its factorization.

55577765 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12151.

The product of its digits is 1286250, while the sum is 47.

The square root of 55577765 is about 7455.0496309548. The cubic root of 55577765 is about 381.6222543450.

The spelling of 55577765 in words is "fifty-five million, five hundred seventy-seven thousand, seven hundred sixty-five".