782470216809 has 24 divisors (see below), whose sum is σ = 1156296615552. Its totient is φ = 509748301440.

The previous prime is 782470216799. The next prime is 782470216837. The reversal of 782470216809 is 908612074287.

It is a happy number.

782470216809 is a `hidden beast` number, since 7 + 8 + 2 + 470 + 2 + 168 + 0 + 9 = 666.

It is not a de Polignac number, because 782470216809 - 2⁸ = 782470216553 is a prime.

It is a super-2 number, since 2×782470216809² (a number of 25 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (782470216849) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 5346037 + ... + 5490450.

It is an arithmetic number, because the mean of its divisors is an integer number (48179025648).

Almost surely, 2^782470216809 is an apocalyptic number.

It is an amenable number.

782470216809 is a deficient number, since it is larger than the sum of its proper divisors (373826398743).

782470216809 is a wasteful number, since it uses less digits than its factorization.

782470216809 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10836677 (or 10836674 counting only the distinct ones).

The product of its (nonzero) digits is 2709504, while the sum is 54.

The spelling of 782470216809 in words is "seven hundred eighty-two billion, four hundred seventy million, two hundred sixteen thousand, eight hundred nine".