838280563621 has 12 divisors (see below), whose sum is σ = 878497735500. Its totient is φ = 799833795200.

The previous prime is 838280563609. The next prime is 838280563649. The reversal of 838280563621 is 126365082838.

838280563621 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 2 ways, for example, as 613576122721 + 224704440900 = 783311^2 + 474030^2 .

It is not a de Polignac number, because 838280563621 - 2¹⁵ = 838280530853 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 (838280563651) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 1763746 + ... + 2188003.

It is an arithmetic number, because the mean of its divisors is an integer number (73208144625).

Almost surely, 2^838280563621 is an apocalyptic number.

It is an amenable number.

838280563621 is a deficient number, since it is larger than the sum of its proper divisors (40217171879).

838280563621 is a wasteful number, since it uses less digits than its factorization.

838280563621 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3952196 (or 3952173 counting only the distinct ones).

The product of its (nonzero) digits is 3317760, while the sum is 52.

The spelling of 838280563621 in words is "eight hundred thirty-eight billion, two hundred eighty million, five hundred sixty-three thousand, six hundred twenty-one".