1816836653 has 8 divisors (see below), whose sum is σ = 1863267840. Its totient is φ = 1770729520.

The previous prime is 1816836611. The next prime is 1816836667. The reversal of 1816836653 is 3566386181.

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 1816836653 - 2⁶ = 1816836589 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (47).

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1816836598 and 1816836607.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1816839653) 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, 69638 + ... + 92103.

It is an arithmetic number, because the mean of its divisors is an integer number (232908480).

Almost surely, 2^1816836653 is an apocalyptic number.

It is an amenable number.

1816836653 is a deficient number, since it is larger than the sum of its proper divisors (46431187).

1816836653 is a wasteful number, since it uses less digits than its factorization.

1816836653 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 162027.

The product of its digits is 622080, while the sum is 47.

The square root of 1816836653 is about 42624.3668926589. The cubic root of 1816836653 is about 1220.2213727554.

The spelling of 1816836653 in words is "one billion, eight hundred sixteen million, eight hundred thirty-six thousand, six hundred fifty-three".