55916642089 has 81 divisors (see below), whose sum is σ = 74377274391. Its totient is φ = 41883035040.

The previous prime is 55916642081. The next prime is 55916642113. The reversal of 55916642089 is 98024661955.

The square root of 55916642089 is 236467.

It is a perfect power (a square), and thus also a powerful number.

It can be written as a sum of positive squares in only one way, i.e., 50034979225 + 5881662864 = 223685^2 + 76692^2 .

It is not a de Polignac number, because 55916642089 - 2³ = 55916642081 is a prime.

It is not an unprimeable number, because it can be changed into a prime (55916642081) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 80 ways as a sum of consecutive naturals, for example, 673694442 + ... + 673694524.

Almost surely, 2^55916642089 is an apocalyptic number.

55916642089 is the 236467-th square number.

55916642089 is the 118234-th centered octagonal number.

It is an amenable number.

55916642089 is a deficient number, since it is larger than the sum of its proper divisors (18460632302).

55916642089 is an equidigital number, since it uses as much as digits as its factorization.

55916642089 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 276 (or 138 counting only the distinct ones).

The product of its (nonzero) digits is 4665600, while the sum is 55.

The spelling of 55916642089 in words is "fifty-five billion, nine hundred sixteen million, six hundred forty-two thousand, eighty-nine".