1816348057 has 4 divisors (see below), whose sum is σ = 1841930496. Its totient is φ = 1790765620.

The previous prime is 1816348049. The next prime is 1816348067. The reversal of 1816348057 is 7508436181.

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 1816348057 - 2³ = 1816348049 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1816348067) 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, 12791113 + ... + 12791254.

It is an arithmetic number, because the mean of its divisors is an integer number (460482624).

Almost surely, 2^1816348057 is an apocalyptic number.

It is an amenable number.

1816348057 is a deficient number, since it is larger than the sum of its proper divisors (25582439).

1816348057 is an equidigital number, since it uses as much as digits as its factorization.

1816348057 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 25582438.

The product of its (nonzero) digits is 161280, while the sum is 43.

The square root of 1816348057 is about 42618.6350907675. The cubic root of 1816348057 is about 1220.1119795540. Note that the first 3 decimals are identical.

The spelling of 1816348057 in words is "one billion, eight hundred sixteen million, three hundred forty-eight thousand, fifty-seven".