1816774081 has 8 divisors (see below), whose sum is σ = 1821312000. Its totient is φ = 1812243600.

The previous prime is 1816774033. The next prime is 1816774097. The reversal of 1816774081 is 1804776181.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1816774081 is a prime.

It is a super-2 number, since 2×1816774081² = 6601336122786789122, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1816774181) 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, 1172095 + ... + 1173643.

It is an arithmetic number, because the mean of its divisors is an integer number (227664000).

Almost surely, 2^1816774081 is an apocalyptic number.

It is an amenable number.

1816774081 is a deficient number, since it is larger than the sum of its proper divisors (4537919).

1816774081 is a wasteful number, since it uses less digits than its factorization.

1816774081 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3719.

The product of its (nonzero) digits is 75264, while the sum is 43.

The square root of 1816774081 is about 42623.6328930325. The cubic root of 1816774081 is about 1220.2073644206.

The spelling of 1816774081 in words is "one billion, eight hundred sixteen million, seven hundred seventy-four thousand, eighty-one".