10782821008639 has 4 divisors (see below), whose sum is σ = 11154642422760. Its totient is φ = 10410999594520.

The previous prime is 10782821008633. The next prime is 10782821008681. The reversal of 10782821008639 is 93680012828701.

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

It is a cyclic number.

It is not a de Polignac number, because 10782821008639 - 2³¹ = 10780673524991 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 10782821008639.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (10782821008633) 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, 185910707017 + ... + 185910707074.

It is an arithmetic number, because the mean of its divisors is an integer number (2788660605690).

Almost surely, 2^{10782821008639} is an apocalyptic number.

10782821008639 is a deficient number, since it is larger than the sum of its proper divisors (371821414121).

10782821008639 is an equidigital number, since it uses as much as digits as its factorization.

10782821008639 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 371821414120.

The product of its (nonzero) digits is 2322432, while the sum is 55.

The spelling of 10782821008639 in words is "ten trillion, seven hundred eighty-two billion, eight hundred twenty-one million, eight thousand, six hundred thirty-nine".