821130073049 has 32 divisors (see below), whose sum is σ = 990919372800. Its totient is φ = 670326969600.

The previous prime is 821130073021. The next prime is 821130073069. The reversal of 821130073049 is 940370031128.

It is a cyclic number.

It is not a de Polignac number, because 821130073049 - 2¹⁶ = 821130007513 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (821130073069) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 53489627 + ... + 53504975.

It is an arithmetic number, because the mean of its divisors is an integer number (30966230400).

Almost surely, 2^821130073049 is an apocalyptic number.

It is an amenable number.

821130073049 is a deficient number, since it is larger than the sum of its proper divisors (169789299751).

821130073049 is a wasteful number, since it uses less digits than its factorization.

821130073049 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 25521.

The product of its (nonzero) digits is 36288, while the sum is 38.

The spelling of 821130073049 in words is "eight hundred twenty-one billion, one hundred thirty million, seventy-three thousand, forty-nine".