54561649 has 2 divisors, whose sum is σ = 54561650. Its totient is φ = 54561648.

The previous prime is 54561629. The next prime is 54561659. The reversal of 54561649 is 94616545.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 51739249 + 2822400 = 7193^2 + 1680^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-54561649 is a prime.

It is not a weakly prime, because it can be changed into another prime (54561629) 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, 27280824 + 27280825.

It is an arithmetic number, because the mean of its divisors is an integer number (27280825).

Almost surely, 2^54561649 is an apocalyptic number.

It is an amenable number.

54561649 is a deficient number, since it is larger than the sum of its proper divisors (1).

54561649 is an equidigital number, since it uses as much as digits as its factorization.

54561649 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 129600, while the sum is 40.

The square root of 54561649 is about 7386.5857471500. The cubic root of 54561649 is about 379.2822300299.

It can be divided in two parts, 5 and 4561649, that added together give a palindrome (4561654).

The spelling of 54561649 in words is "fifty-four million, five hundred sixty-one thousand, six hundred forty-nine".