1816408421307 has 6 divisors (see below), whose sum is σ = 2623701053012. Its totient is φ = 1210938947532.

The previous prime is 1816408421299. The next prime is 1816408421309. The reversal of 1816408421307 is 7031248046181.

1816408421307 is a `hidden beast` number, since 18 + 16 + 408 + 4 + 213 + 0 + 7 = 666.

It is not a de Polignac number, because 1816408421307 - 2³ = 1816408421299 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1816408421309) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 100911578953 + ... + 100911578970.

Almost surely, 2^{1816408421307} is an apocalyptic number.

1816408421307 is a deficient number, since it is larger than the sum of its proper divisors (807292631705).

1816408421307 is a wasteful number, since it uses less digits than its factorization.

1816408421307 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 201823157929 (or 201823157926 counting only the distinct ones).

The product of its (nonzero) digits is 258048, while the sum is 45.

The spelling of 1816408421307 in words is "one trillion, eight hundred sixteen billion, four hundred eight million, four hundred twenty-one thousand, three hundred seven".