947427742881 has 75 divisors (see below), whose sum is σ = 1473252795861. Its totient is φ = 606768639984.

The previous prime is 947427742837. The next prime is 947427742991. The reversal of 947427742881 is 188247724749.

The square root of 947427742881 is 973359.

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

947427742881 is a `hidden beast` number, since 9 + 47 + 427 + 74 + 28 + 81 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 590732125281 + 356695617600 = 768591^2 + 597240^2 .

It is not a de Polignac number, because 947427742881 - 2¹⁵ = 947427710113 is a prime.

It is a super-2 number, since 2×947427742881² (a number of 25 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (947427742831) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 74 ways as a sum of consecutive naturals, for example, 11992756200 + ... + 11992756278.

Almost surely, 2^947427742881 is an apocalyptic number.

947427742881 is the 973359-th square number.

947427742881 is the 486680-th centered octagonal number.

It is an amenable number.

947427742881 is a deficient number, since it is larger than the sum of its proper divisors (525825052980).

947427742881 is an frugal number, since it uses more digits than its factorization.

947427742881 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 318 (or 119 counting only the distinct ones).

The product of its digits is 50577408, while the sum is 63.

The spelling of 947427742881 in words is "nine hundred forty-seven billion, four hundred twenty-seven million, seven hundred forty-two thousand, eight hundred eighty-one".