1408682000821 has 4 divisors (see below), whose sum is σ = 1443040098444. Its totient is φ = 1374323903200.

The previous prime is 1408682000813. The next prime is 1408682000837. The reversal of 1408682000821 is 1280002868041.

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 291092620900 + 1117589379921 = 539530^2 + 1057161^2 .

It is not a de Polignac number, because 1408682000821 - 2³ = 1408682000813 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1408682003821) 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, 17179048750 + ... + 17179048831.

It is an arithmetic number, because the mean of its divisors is an integer number (360760024611).

Almost surely, 2^{1408682000821} is an apocalyptic number.

It is an amenable number.

1408682000821 is a deficient number, since it is larger than the sum of its proper divisors (34358097623).

1408682000821 is an equidigital number, since it uses as much as digits as its factorization.

1408682000821 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 34358097622.

The product of its (nonzero) digits is 49152, while the sum is 40.

Adding to 1408682000821 its reverse (1280002868041), we get a palindrome (2688684868862).

The spelling of 1408682000821 in words is "one trillion, four hundred eight billion, six hundred eighty-two million, eight hundred twenty-one", and thus it is an aban number.