55557644 has 6 divisors (see below), whose sum is σ = 97225884. Its totient is φ = 27778820.

The previous prime is 55557643. The next prime is 55557661. The reversal of 55557644 is 44675555.

It is not an unprimeable number, because it can be changed into a prime (55557643) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6944702 + ... + 6944709.

It is an arithmetic number, because the mean of its divisors is an integer number (16204314).

Almost surely, 2^55557644 is an apocalyptic number.

It is an amenable number.

55557644 is a deficient number, since it is larger than the sum of its proper divisors (41668240).

55557644 is a wasteful number, since it uses less digits than its factorization.

55557644 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13889415 (or 13889413 counting only the distinct ones).

The product of its digits is 420000, while the sum is 41.

The square root of 55557644 is about 7453.7000207950. The cubic root of 55557644 is about 381.5761954687.

The spelling of 55557644 in words is "fifty-five million, five hundred fifty-seven thousand, six hundred forty-four".