782008885397 has 4 divisors (see below), whose sum is σ = 803144260716. Its totient is φ = 760873510080.

The previous prime is 782008885351. The next prime is 782008885423. The reversal of 782008885397 is 793588800287.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 472829515876 + 309179369521 = 687626^2 + 556039^2 .

It is a cyclic number.

It is not a de Polignac number, because 782008885397 - 2¹⁰ = 782008884373 is a prime.

It is a super-2 number, since 2×782008885397² (a number of 25 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (782008885897) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 10567687604 + ... + 10567687677.

It is an arithmetic number, because the mean of its divisors is an integer number (200786065179).

Almost surely, 2^782008885397 is an apocalyptic number.

It is an amenable number.

782008885397 is a deficient number, since it is larger than the sum of its proper divisors (21135375319).

782008885397 is a wasteful number, since it uses less digits than its factorization.

782008885397 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 21135375318.

The product of its (nonzero) digits is 54190080, while the sum is 65.

The spelling of 782008885397 in words is "seven hundred eighty-two billion, eight million, eight hundred eighty-five thousand, three hundred ninety-seven".