55345705561 has 4 divisors (see below), whose sum is σ = 55583241012. Its totient is φ = 55108170112.

The previous prime is 55345705553. The next prime is 55345705567. The reversal of 55345705561 is 16550754355.

It is a happy number.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 5814977536 + 49530728025 = 76256^2 + 222555^2 .

It is a cyclic number.

It is not a de Polignac number, because 55345705561 - 2³ = 55345705553 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (55345705567) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 118767376 + ... + 118767841.

It is an arithmetic number, because the mean of its divisors is an integer number (13895810253).

Almost surely, 2^55345705561 is an apocalyptic number.

It is an amenable number.

55345705561 is a deficient number, since it is larger than the sum of its proper divisors (237535451).

55345705561 is a wasteful number, since it uses less digits than its factorization.

55345705561 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 237535450.

The product of its (nonzero) digits is 1575000, while the sum is 46.

The spelling of 55345705561 in words is "fifty-five billion, three hundred forty-five million, seven hundred five thousand, five hundred sixty-one".