921246753856 has 189 divisors, whose sum is σ = 2178453603333. Its totient is φ = 386076387840.

The previous prime is 921246753839. The next prime is 921246753863. The reversal of 921246753856 is 658357642129.

The square root of 921246753856 is 959816.

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

921246753856 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in only one way, i.e., 136279105600 + 784967648256 = 369160^2 + 885984^2 .

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 921246753856.

It is an unprimeable number.

It is a polite number, since it can be written in 26 ways as a sum of consecutive naturals, for example, 1098029085 + ... + 1098029923.

Almost surely, 2^921246753856 is an apocalyptic number.

921246753856 is the 959816-th square number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 921246753856

921246753856 is an abundant number, since it is smaller than the sum of its proper divisors (1257206849477).

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

921246753856 is an equidigital number, since it uses as much as digits as its factorization.

921246753856 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1738 (or 865 counting only the distinct ones).

The product of its digits is 21772800, while the sum is 58.

The spelling of 921246753856 in words is "nine hundred twenty-one billion, two hundred forty-six million, seven hundred fifty-three thousand, eight hundred fifty-six".