1816814650 has 144 divisors (see below), whose sum is σ = 4202590392. Its totient is φ = 580608000.

The previous prime is 1816814621. The next prime is 1816814683. The reversal of 1816814650 is 564186181.

It can be written as a sum of positive squares in 12 ways, for example, as 65141041 + 1751673609 = 8071^2 + 41853^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 71 ways as a sum of consecutive naturals, for example, 7538530 + ... + 7538770.

Almost surely, 2^1816814650 is an apocalyptic number.

1816814650 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

1816814650 is an abundant number, since it is smaller than the sum of its proper divisors (2385775742).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1816814650 is a wasteful number, since it uses less digits than its factorization.

1816814650 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 465 (or 453 counting only the distinct ones).

The product of its (nonzero) digits is 46080, while the sum is 40.

The square root of 1816814650 is about 42624.1087883371. The cubic root of 1816814650 is about 1220.2164468605.

The spelling of 1816814650 in words is "one billion, eight hundred sixteen million, eight hundred fourteen thousand, six hundred fifty".