1810826664 has 64 divisors (see below), whose sum is σ = 4745442240. Its totient is φ = 575178240.

The previous prime is 1810826629. The next prime is 1810826683. The reversal of 1810826664 is 4666280181.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 20914 + ... + 63710.

It is an arithmetic number, because the mean of its divisors is an integer number (74147535).

Almost surely, 2^1810826664 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1810826664, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2372721120).

1810826664 is an abundant number, since it is smaller than the sum of its proper divisors (2934615576).

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

1810826664 is a wasteful number, since it uses less digits than its factorization.

1810826664 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 42890 (or 42886 counting only the distinct ones).

The product of its (nonzero) digits is 110592, while the sum is 42.

The square root of 1810826664 is about 42553.8090421997. The cubic root of 1810826664 is about 1218.8744128824.

The spelling of 1810826664 in words is "one billion, eight hundred ten million, eight hundred twenty-six thousand, six hundred sixty-four".