1816738747 has 8 divisors (see below), whose sum is σ = 1840688640. Its totient is φ = 1792812840.

The previous prime is 1816738733. The next prime is 1816738793. The reversal of 1816738747 is 7478376181.

It is a happy number.

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

It is a cyclic number.

It is not a de Polignac number, because 1816738747 - 2⁷ = 1816738619 is a prime.

It is a super-2 number, since 2×1816738747² = 6601079349702260018, which contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1816738694 and 1816738703.

It is not an unprimeable number, because it can be changed into a prime (1816718747) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 186672 + ... + 196162.

It is an arithmetic number, because the mean of its divisors is an integer number (230086080).

Almost surely, 2^1816738747 is an apocalyptic number.

1816738747 is a deficient number, since it is larger than the sum of its proper divisors (23949893).

1816738747 is an equidigital number, since it uses as much as digits as its factorization.

1816738747 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11993.

The product of its digits is 1580544, while the sum is 52.

The square root of 1816738747 is about 42623.2184026500. The cubic root of 1816738747 is about 1220.1994538633.

The spelling of 1816738747 in words is "one billion, eight hundred sixteen million, seven hundred thirty-eight thousand, seven hundred forty-seven".