55561783345 has 4 divisors (see below), whose sum is σ = 66674140020. Its totient is φ = 44449426672.

The previous prime is 55561783331. The next prime is 55561783369. The reversal of 55561783345 is 54338716555.

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 35157375009 + 20404408336 = 187503^2 + 142844^2 .

It is a cyclic number.

It is not a de Polignac number, because 55561783345 - 2²⁷ = 55427565617 is a prime.

It is a super-2 number, since 2×55561783345² (a number of 22 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 55561783292 and 55561783301.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 5556178330 + ... + 5556178339.

It is an arithmetic number, because the mean of its divisors is an integer number (16668535005).

Almost surely, 2^55561783345 is an apocalyptic number.

It is an amenable number.

55561783345 is a deficient number, since it is larger than the sum of its proper divisors (11112356675).

55561783345 is a wasteful number, since it uses less digits than its factorization.

55561783345 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11112356674.

The product of its digits is 7560000, while the sum is 52.

The spelling of 55561783345 in words is "fifty-five billion, five hundred sixty-one million, seven hundred eighty-three thousand, three hundred forty-five".