821875449330 has 48 divisors (see below), whose sum is σ = 2301251261400. Its totient is φ = 202307802624.

The previous prime is 821875449323. The next prime is 821875449389. The reversal of 821875449330 is 33944578128.

It is a happy number.

821875449330 is a `hidden beast` number, since 8 + 2 + 1 + 8 + 7 + 544 + 93 + 3 + 0 = 666.

It can be written as a sum of positive squares in 4 ways, for example, as 464042976849 + 357832472481 = 681207^2 + 598191^2 .

It is a super-2 number, since 2×821875449330² (a number of 25 digits) contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 351227655 + ... + 351229994.

Almost surely, 2^821875449330 is an apocalyptic number.

821875449330 is an abundant number, since it is smaller than the sum of its proper divisors (1479375812070).

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

821875449330 is a wasteful number, since it uses less digits than its factorization.

821875449330 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 702457675 (or 702457672 counting only the distinct ones).

The product of its (nonzero) digits is 5806080, while the sum is 54.

The spelling of 821875449330 in words is "eight hundred twenty-one billion, eight hundred seventy-five million, four hundred forty-nine thousand, three hundred thirty".