55577745 has 48 divisors (see below), whose sum is σ = 100900800. Its totient is φ = 29346624.

The previous prime is 55577719. The next prime is 55577789. The reversal of 55577745 is 54777555.

It is a happy number.

55577745 is a `hidden beast` number, since 5 + 5 + 577 + 74 + 5 = 666.

It is not a de Polignac number, because 55577745 - 2⁷ = 55577617 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is a self number, because there is not a number n which added to its sum of digits gives 55577745.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 180882 + ... + 181188.

It is an arithmetic number, because the mean of its divisors is an integer number (2102100).

Almost surely, 2^55577745 is an apocalyptic number.

It is an amenable number.

55577745 is a deficient number, since it is larger than the sum of its proper divisors (45323055).

55577745 is a wasteful number, since it uses less digits than its factorization.

55577745 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 476 (or 464 counting only the distinct ones).

The product of its digits is 857500, while the sum is 45.

The square root of 55577745 is about 7455.0482895820. The cubic root of 55577745 is about 381.6222085686.

The spelling of 55577745 in words is "fifty-five million, five hundred seventy-seven thousand, seven hundred forty-five".