1816716465 has 64 divisors (see below), whose sum is σ = 3328945920. Its totient is φ = 939340800.

The previous prime is 1816716443. The next prime is 1816716487. The reversal of 1816716465 is 5646176181.

1816716465 is a `hidden beast` number, since 18 + 167 + 16 + 465 = 666.

It is an interprime number because it is at equal distance from previous prime (1816716443) and next prime (1816716487).

It is not a de Polignac number, because 1816716465 - 2¹⁹ = 1816192177 is a prime.

It is a Smith number, since the sum of its digits (45) coincides with the sum of the digits of its prime factors.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is a self number, because there is not a number n which added to its sum of digits gives 1816716465.

It is an unprimeable number.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 2002542 + ... + 2003448.

It is an arithmetic number, because the mean of its divisors is an integer number (52014780).

Almost surely, 2^1816716465 is an apocalyptic number.

1816716465 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

1816716465 is a deficient number, since it is larger than the sum of its proper divisors (1512229455).

1816716465 is a wasteful number, since it uses less digits than its factorization.

1816716465 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1359 (or 1353 counting only the distinct ones).

The product of its digits is 241920, while the sum is 45.

The square root of 1816716465 is about 42622.9570184895. The cubic root of 1816716465 is about 1220.1944653282.

It can be divided in two parts, 1816716 and 465, that added together give a palindrome (1817181).

The spelling of 1816716465 in words is "one billion, eight hundred sixteen million, seven hundred sixteen thousand, four hundred sixty-five".