856794599424 has 195 divisors, whose sum is σ = 2561087317327. Its totient is φ = 285420478464.

The previous prime is 856794599413. The next prime is 856794599449. The reversal of 856794599424 is 424995497658.

The square root of 856794599424 is 925632.

It is a perfect power (a square), and thus also a powerful number.

856794599424 is a `hidden beast` number, since 8 + 5 + 6 + 7 + 9 + 4 + 599 + 4 + 24 = 666.

It is a super-2 number, since 2×856794599424² (a number of 25 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (72).

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 14 ways as a sum of consecutive naturals, for example, 533163229 + ... + 533164835.

Almost surely, 2^856794599424 is an apocalyptic number.

856794599424 is the 925632-nd square number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 856794599424

856794599424 is an abundant number, since it is smaller than the sum of its proper divisors (1704292717903).

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

856794599424 is an frugal number, since it uses more digits than its factorization.

856794599424 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3250 (or 1612 counting only the distinct ones).

The product of its digits is 783820800, while the sum is 72.

The spelling of 856794599424 in words is "eight hundred fifty-six billion, seven hundred ninety-four million, five hundred ninety-nine thousand, four hundred twenty-four".