55071649 has 2 divisors, whose sum is σ = 55071650. Its totient is φ = 55071648.

The previous prime is 55071641. The next prime is 55071689. The reversal of 55071649 is 94617055.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 30747025 + 24324624 = 5545^2 + 4932^2 .

It is a cyclic number.

It is not a de Polignac number, because 55071649 - 2³ = 55071641 is a prime.

It is not a weakly prime, because it can be changed into another prime (55071641) 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 as a sum of consecutive naturals, namely, 27535824 + 27535825.

It is an arithmetic number, because the mean of its divisors is an integer number (27535825).

Almost surely, 2^55071649 is an apocalyptic number.

It is an amenable number.

55071649 is a deficient number, since it is larger than the sum of its proper divisors (1).

55071649 is an equidigital number, since it uses as much as digits as its factorization.

55071649 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 37800, while the sum is 37.

The square root of 55071649 is about 7421.0274895057. The cubic root of 55071649 is about 380.4603124438.

The spelling of 55071649 in words is "fifty-five million, seventy-one thousand, six hundred forty-nine".