821476393460 has 48 divisors (see below), whose sum is σ = 1727690746320. Its totient is φ = 328097402880.

The previous prime is 821476393453. The next prime is 821476393709. The reversal of 821476393460 is 64393674128.

It can be written as a sum of positive squares in 8 ways, for example, as 35108266384 + 786368127076 = 187372^2 + 886774^2 .

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 110158052 + ... + 110165508.

It is an arithmetic number, because the mean of its divisors is an integer number (35993557215).

Almost surely, 2^821476393460 is an apocalyptic number.

It is an amenable number.

821476393460 is an abundant number, since it is smaller than the sum of its proper divisors (906214352860).

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

821476393460 is a wasteful number, since it uses less digits than its factorization.

821476393460 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14996 (or 14994 counting only the distinct ones).

The product of its (nonzero) digits is 5225472, while the sum is 53.

The spelling of 821476393460 in words is "eight hundred twenty-one billion, four hundred seventy-six million, three hundred ninety-three thousand, four hundred sixty".