826450018820 has 12 divisors (see below), whose sum is σ = 1735545039564. Its totient is φ = 330580007520.

The previous prime is 826450018787. The next prime is 826450018843. The reversal of 826450018820 is 28810054628.

It can be written as a sum of positive squares in 2 ways, for example, as 523131065284 + 303318953536 = 723278^2 + 550744^2 .

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 20661250451 + ... + 20661250490.

It is an arithmetic number, because the mean of its divisors is an integer number (144628753297).

Almost surely, 2^826450018820 is an apocalyptic number.

It is an amenable number.

826450018820 is an abundant number, since it is smaller than the sum of its proper divisors (909095020744).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

826450018820 is a wasteful number, since it uses less digits than its factorization.

826450018820 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 41322500950 (or 41322500948 counting only the distinct ones).

The product of its (nonzero) digits is 245760, while the sum is 44.

The spelling of 826450018820 in words is "eight hundred twenty-six billion, four hundred fifty million, eighteen thousand, eight hundred twenty".