55616057 has 4 divisors (see below), whose sum is σ = 63561216. Its totient is φ = 47670900.

The previous prime is 55616039. The next prime is 55616083. The reversal of 55616057 is 75061655.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 75061655 = 5 ⋅15012331.

It is a cyclic number.

It is not a de Polignac number, because 55616057 - 2¹⁸ = 55353913 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (55646057) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3972569 + ... + 3972582.

It is an arithmetic number, because the mean of its divisors is an integer number (15890304).

Almost surely, 2^55616057 is an apocalyptic number.

It is an amenable number.

55616057 is a deficient number, since it is larger than the sum of its proper divisors (7945159).

55616057 is an equidigital number, since it uses as much as digits as its factorization.

55616057 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7945158.

The product of its (nonzero) digits is 31500, while the sum is 35.

The square root of 55616057 is about 7457.6173809066. The cubic root of 55616057 is about 381.7098776635.

The spelling of 55616057 in words is "fifty-five million, six hundred sixteen thousand, fifty-seven".