974644792081 has 9 divisors (see below), whose sum is σ = 1035367140721. Its totient is φ = 917296949632.

The previous prime is 974644792057. The next prime is 974644792129. The reversal of 974644792081 is 180297446479.

The square root of 974644792081 is 987241.

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

It can be written as a sum of positive squares in 4 ways, for example, as 76623222481 + 898021569600 = 276809^2 + 947640^2 .

It is not a de Polignac number, because 974644792081 - 2¹¹ = 974644790033 is a prime.

It is a super-2 number, since 2×974644792081² (a number of 25 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (974644792001) 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, 16754061 + ... + 16812133.

Almost surely, 2^974644792081 is an apocalyptic number.

974644792081 is the 987241-st square number.

974644792081 is the 493621-st centered octagonal number.

It is an amenable number.

974644792081 is a deficient number, since it is larger than the sum of its proper divisors (60722348640).

974644792081 is an frugal number, since it uses more digits than its factorization.

974644792081 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 116180 (or 58090 counting only the distinct ones).

The product of its (nonzero) digits is 24385536, while the sum is 61.

The spelling of 974644792081 in words is "nine hundred seventy-four billion, six hundred forty-four million, seven hundred ninety-two thousand, eighty-one".