1816795555 has 16 divisors (see below), whose sum is σ = 2230767360. Its totient is φ = 1419998688.

The previous prime is 1816795543. The next prime is 1816795573. The reversal of 1816795555 is 5555976181.

It is a cyclic number.

It is not a de Polignac number, because 1816795555 - 2¹³ = 1816787363 is a prime.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 29194 + ... + 66976.

It is an arithmetic number, because the mean of its divisors is an integer number (139422960).

Almost surely, 2^1816795555 is an apocalyptic number.

1816795555 is a deficient number, since it is larger than the sum of its proper divisors (413971805).

1816795555 is a wasteful number, since it uses less digits than its factorization.

1816795555 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 38010.

The product of its digits is 1890000, while the sum is 52.

The square root of 1816795555 is about 42623.8847947955. The cubic root of 1816795555 is about 1220.2121719584.

The spelling of 1816795555 in words is "one billion, eight hundred sixteen million, seven hundred ninety-five thousand, five hundred fifty-five".