55255346561 has 4 divisors (see below), whose sum is σ = 55921073712. Its totient is φ = 54589619412.

The previous prime is 55255346513. The next prime is 55255346569. The reversal of 55255346561 is 16564355255.

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.

It is a cyclic number.

It is not a de Polignac number, because 55255346561 - 2²⁶ = 55188237697 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (55255346569) 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, 332863451 + ... + 332863616.

It is an arithmetic number, because the mean of its divisors is an integer number (13980268428).

Almost surely, 2^55255346561 is an apocalyptic number.

It is an amenable number.

55255346561 is a deficient number, since it is larger than the sum of its proper divisors (665727151).

55255346561 is an equidigital number, since it uses as much as digits as its factorization.

55255346561 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 665727150.

The product of its digits is 2700000, while the sum is 47.

The spelling of 55255346561 in words is "fifty-five billion, two hundred fifty-five million, three hundred forty-six thousand, five hundred sixty-one".