8420815403441 has 4 divisors (see below), whose sum is σ = 9623789032512. Its totient is φ = 7217841774372.

The previous prime is 8420815403419. The next prime is 8420815403491. The reversal of 8420815403441 is 1443045180248.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-8420815403441 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 8420815403392 and 8420815403401.

It is not an unprimeable number, because it can be changed into a prime (8420815403491) 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, 601486814525 + ... + 601486814538.

It is an arithmetic number, because the mean of its divisors is an integer number (2405947258128).

Almost surely, 2^{8420815403441} is an apocalyptic number.

It is an amenable number.

8420815403441 is a deficient number, since it is larger than the sum of its proper divisors (1202973629071).

8420815403441 is a wasteful number, since it uses less digits than its factorization.

8420815403441 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1202973629070.

The product of its (nonzero) digits is 491520, while the sum is 44.

The spelling of 8420815403441 in words is "eight trillion, four hundred twenty billion, eight hundred fifteen million, four hundred three thousand, four hundred forty-one".