821453088025 has 6 divisors (see below), whose sum is σ = 1018601829182. Its totient is φ = 657162470400.

The previous prime is 821453087981. The next prime is 821453088061. The reversal of 821453088025 is 520880354128.

It can be written as a sum of positive squares in 3 ways, for example, as 35741036809 + 785712051216 = 189053^2 + 886404^2 .

It is not a de Polignac number, because 821453088025 - 2¹³ = 821453079833 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 16429061736 + ... + 16429061785.

Almost surely, 2^821453088025 is an apocalyptic number.

It is an amenable number.

821453088025 is a deficient number, since it is larger than the sum of its proper divisors (197148741157).

821453088025 is a wasteful number, since it uses less digits than its factorization.

821453088025 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 32858123531 (or 32858123526 counting only the distinct ones).

The product of its (nonzero) digits is 614400, while the sum is 46.

The spelling of 821453088025 in words is "eight hundred twenty-one billion, four hundred fifty-three million, eighty-eight thousand, twenty-five".