55742761 has 2 divisors, whose sum is σ = 55742762. Its totient is φ = 55742760.

The previous prime is 55742741. The next prime is 55742767. The reversal of 55742761 is 16724755.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 32035600 + 23707161 = 5660^2 + 4869^2 .

It is a cyclic number.

It is not a de Polignac number, because 55742761 - 2⁹ = 55742249 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 55742761.

It is not a weakly prime, because it can be changed into another prime (55742767) 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, 27871380 + 27871381.

It is an arithmetic number, because the mean of its divisors is an integer number (27871381).

Almost surely, 2^55742761 is an apocalyptic number.

It is an amenable number.

55742761 is a deficient number, since it is larger than the sum of its proper divisors (1).

55742761 is an equidigital number, since it uses as much as digits as its factorization.

55742761 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 58800, while the sum is 37.

The square root of 55742761 is about 7466.1074865019. The cubic root of 55742761 is about 381.9995271505. Note that the first 3 decimals are identical.

The spelling of 55742761 in words is "fifty-five million, seven hundred forty-two thousand, seven hundred sixty-one".