821803040267 has 16 divisors (see below), whose sum is σ = 955067137920. Its totient is φ = 699245553600.

The previous prime is 821803040249. The next prime is 821803040323. The reversal of 821803040267 is 762040308128.

It is not a de Polignac number, because 821803040267 - 2²⁸ = 821534604811 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (821803040237) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 23669834 + ... + 23704527.

It is an arithmetic number, because the mean of its divisors is an integer number (59691696120).

Almost surely, 2^821803040267 is an apocalyptic number.

821803040267 is a deficient number, since it is larger than the sum of its proper divisors (133264097653).

821803040267 is a wasteful number, since it uses less digits than its factorization.

821803040267 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 47374474.

The product of its (nonzero) digits is 129024, while the sum is 41.

The spelling of 821803040267 in words is "eight hundred twenty-one billion, eight hundred three million, forty thousand, two hundred sixty-seven".