55575761 has 4 divisors (see below), whose sum is σ = 56758272. Its totient is φ = 54393252.

The previous prime is 55575757. The next prime is 55575811. The reversal of 55575761 is 16757555.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 16757555 = 5 ⋅3351511.

It is a cyclic number.

It is not a de Polignac number, because 55575761 - 2² = 55575757 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (55575161) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 591185 + ... + 591278.

It is an arithmetic number, because the mean of its divisors is an integer number (14189568).

Almost surely, 2^55575761 is an apocalyptic number.

It is an amenable number.

55575761 is a deficient number, since it is larger than the sum of its proper divisors (1182511).

55575761 is a wasteful number, since it uses less digits than its factorization.

55575761 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1182510.

The product of its digits is 183750, while the sum is 41.

The square root of 55575761 is about 7454.9152241994. The cubic root of 55575761 is about 381.6176674975.

The spelling of 55575761 in words is "fifty-five million, five hundred seventy-five thousand, seven hundred sixty-one".