6989281875625 has 45 divisors (see below), whose sum is σ = 10160406807969. Its totient is φ = 4792333182000.

The previous prime is 6989281875623. The next prime is 6989281875647. The reversal of 6989281875625 is 5265781829896.

The square root of 6989281875625 is 2643725.

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

It can be written as a sum of positive squares in 2 ways, for example, as 547959699049 + 6441322176576 = 740243^2 + 2537976^2 .

It is not a de Polignac number, because 6989281875625 - 2¹ = 6989281875623 is a prime.

It is a super-2 number, since 2×6989281875625² (a number of 26 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (6989281875623) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 44 ways as a sum of consecutive naturals, for example, 462644322 + ... + 462659428.

Almost surely, 2^{6989281875625} is an apocalyptic number.

6989281875625 is the 2643725-th square number.

6989281875625 is the 1321863-rd centered octagonal number.

It is an amenable number.

6989281875625 is a deficient number, since it is larger than the sum of its proper divisors (3171124932344).

6989281875625 is an frugal number, since it uses more digits than its factorization.

6989281875625 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 30248 (or 15119 counting only the distinct ones).

The product of its digits is 1045094400, while the sum is 76.

The spelling of 6989281875625 in words is "six trillion, nine hundred eighty-nine billion, two hundred eighty-one million, eight hundred seventy-five thousand, six hundred twenty-five".