55717761 has 32 divisors (see below), whose sum is σ = 83329920. Its totient is φ = 32832000.

The previous prime is 55717679. The next prime is 55717769. The reversal of 55717761 is 16771755.

It is not a de Polignac number, because 55717761 - 2¹⁰ = 55716737 is a prime.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (55717769) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 243195 + ... + 243423.

It is an arithmetic number, because the mean of its divisors is an integer number (2604060).

Almost surely, 2^55717761 is an apocalyptic number.

It is an amenable number.

55717761 is a deficient number, since it is larger than the sum of its proper divisors (27612159).

55717761 is a wasteful number, since it uses less digits than its factorization.

55717761 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 417.

The product of its digits is 51450, while the sum is 39.

The square root of 55717761 is about 7464.4330662147. The cubic root of 55717761 is about 381.9424111170.

The spelling of 55717761 in words is "fifty-five million, seven hundred seventeen thousand, seven hundred sixty-one".