491423432256 has 63 divisors (see below), whose sum is σ = 1408624765041. Its totient is φ = 163802202624.

The previous prime is 491423432251. The next prime is 491423432317. The reversal of 491423432256 is 652234324194.

The square root of 491423432256 is 701016.

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

491423432256 is a `hidden beast` number, since 4 + 91 + 4 + 234 + 322 + 5 + 6 = 666.

491423432256 is digitally balanced in base 4, 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., 204470369856 + 286953062400 = 452184^2 + 535680^2 .

It is not an unprimeable number, because it can be changed into a prime (491423432251) by changing a digit.

It is a polite number, since it can be written in 8 ways as a sum of consecutive naturals, for example, 16809780 + ... + 16838988.

Almost surely, 2^491423432256 is an apocalyptic number.

491423432256 is the 701016-th square number.

It is an amenable number.

491423432256 is an abundant number, since it is smaller than the sum of its proper divisors (917201332785).

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

491423432256 is an frugal number, since it uses more digits than its factorization.

491423432256 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 58436 (or 29214 counting only the distinct ones).

The product of its digits is 1244160, while the sum is 45.

The spelling of 491423432256 in words is "four hundred ninety-one billion, four hundred twenty-three million, four hundred thirty-two thousand, two hundred fifty-six".