54045661 has 2 divisors, whose sum is σ = 54045662. Its totient is φ = 54045660.

The previous prime is 54045659. The next prime is 54045683. The reversal of 54045661 is 16654045.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 46172025 + 7873636 = 6795^2 + 2806^2 .

It is a cyclic number.

It is not a de Polignac number, because 54045661 - 2¹ = 54045659 is a prime.

Together with 54045659, it forms a pair of twin primes.

It is a plaindrome in base 16.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (54045631) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 27022830 + 27022831.

It is an arithmetic number, because the mean of its divisors is an integer number (27022831).

Almost surely, 2^54045661 is an apocalyptic number.

It is an amenable number.

54045661 is a deficient number, since it is larger than the sum of its proper divisors (1).

54045661 is an equidigital number, since it uses as much as digits as its factorization.

54045661 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 14400, while the sum is 31.

The square root of 54045661 is about 7351.5754093936. The cubic root of 54045661 is about 378.0828206121.

The spelling of 54045661 in words is "fifty-four million, forty-five thousand, six hundred sixty-one".