55815845290 has 8 divisors (see below), whose sum is σ = 100468521540. Its totient is φ = 22326338112.

The previous prime is 55815845269. The next prime is 55815845291. The reversal of 55815845290 is 9254851855.

It can be written as a sum of positive squares in 2 ways, for example, as 54497501809 + 1318343481 = 233447^2 + 36309^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is not an unprimeable number, because it can be changed into a prime (55815845291) 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, 2790792255 + ... + 2790792274.

Almost surely, 2^55815845290 is an apocalyptic number.

55815845290 is a deficient number, since it is larger than the sum of its proper divisors (44652676250).

55815845290 is a wasteful number, since it uses less digits than its factorization.

55815845290 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5581584536.

The product of its (nonzero) digits is 2880000, while the sum is 52.

The spelling of 55815845290 in words is "fifty-five billion, eight hundred fifteen million, eight hundred forty-five thousand, two hundred ninety".