1781326496 has 48 divisors (see below), whose sum is σ = 3576763008. Its totient is φ = 873120000.

The previous prime is 1781326451. The next prime is 1781326501. The reversal of 1781326496 is 6946231871.

It is a self number, because there is not a number n which added to its sum of digits gives 1781326496.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 330221 + ... + 335571.

It is an arithmetic number, because the mean of its divisors is an integer number (74515896).

Almost surely, 2^1781326496 is an apocalyptic number.

1781326496 is a gapful number since it is divisible by the number (16) formed by its first and last digit.

It is an amenable number.

1781326496 is an abundant number, since it is smaller than the sum of its proper divisors (1795436512).

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

1781326496 is a wasteful number, since it uses less digits than its factorization.

1781326496 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5565 (or 5557 counting only the distinct ones).

The product of its digits is 435456, while the sum is 47.

The square root of 1781326496 is about 42205.7637770009. The cubic root of 1781326496 is about 1212.2192489313.

The spelling of 1781326496 in words is "one billion, seven hundred eighty-one million, three hundred twenty-six thousand, four hundred ninety-six".