1816397126 has 8 divisors (see below), whose sum is σ = 2726812704. Its totient is φ = 907459560.

The previous prime is 1816397123. The next prime is 1816397161. The reversal of 1816397126 is 6217936181.

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1816397123) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 366425 + ... + 371348.

It is an arithmetic number, because the mean of its divisors is an integer number (340851588).

Almost surely, 2^1816397126 is an apocalyptic number.

1816397126 is a deficient number, since it is larger than the sum of its proper divisors (910415578).

1816397126 is a wasteful number, since it uses less digits than its factorization.

1816397126 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 739006.

The product of its digits is 108864, while the sum is 44.

The square root of 1816397126 is about 42619.2107622842. The cubic root of 1816397126 is about 1220.1229666434.

The spelling of 1816397126 in words is "one billion, eight hundred sixteen million, three hundred ninety-seven thousand, one hundred twenty-six".