826360993921 has 2 divisors, whose sum is σ = 826360993922. Its totient is φ = 826360993920.

The previous prime is 826360993889. The next prime is 826360993943. The reversal of 826360993921 is 129399063628.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 452686752400 + 373674241521 = 672820^2 + 611289^2 .

It is a cyclic number.

It is not a de Polignac number, because 826360993921 - 2⁵ = 826360993889 is a prime.

It is not a weakly prime, because it can be changed into another prime (826360993721) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 413180496960 + 413180496961.

It is an arithmetic number, because the mean of its divisors is an integer number (413180496961).

Almost surely, 2^826360993921 is an apocalyptic number.

It is an amenable number.

826360993921 is a deficient number, since it is larger than the sum of its proper divisors (1).

826360993921 is an equidigital number, since it uses as much as digits as its factorization.

826360993921 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 7558272, while the sum is 58.

It can be divided in two parts, 826360 and 993921, that added together give a palindrome (1820281).

The spelling of 826360993921 in words is "eight hundred twenty-six billion, three hundred sixty million, nine hundred ninety-three thousand, nine hundred twenty-one".