55647761 has 8 divisors (see below), whose sum is σ = 60154920. Its totient is φ = 51172992.

The previous prime is 55647737. The next prime is 55647769. The reversal of 55647761 is 16774655.

It can be written as a sum of positive squares in 4 ways, for example, as 591361 + 55056400 = 769^2 + 7420^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a de Polignac number, because none of the positive numbers 2^k-55647761 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (55647769) 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 in 7 ways as a sum of consecutive naturals, for example, 4460 + ... + 11453.

It is an arithmetic number, because the mean of its divisors is an integer number (7519365).

Almost surely, 2^55647761 is an apocalyptic number.

It is an amenable number.

55647761 is a deficient number, since it is larger than the sum of its proper divisors (4507159).

55647761 is a wasteful number, since it uses less digits than its factorization.

55647761 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 16195.

The product of its digits is 176400, while the sum is 41.

The square root of 55647761 is about 7459.7426899324. The cubic root of 55647761 is about 381.7823952768.

The spelling of 55647761 in words is "fifty-five million, six hundred forty-seven thousand, seven hundred sixty-one".