6986125521 has 24 divisors (see below), whose sum is σ = 10224658080. Its totient is φ = 4595894016.

The previous prime is 6986125519. The next prime is 6986125541. The reversal of 6986125521 is 1255216896.

6986125521 is a `hidden beast` number, since 6 + 9 + 8 + 612 + 5 + 5 + 21 = 666.

It is not a de Polignac number, because 6986125521 - 2¹ = 6986125519 is a prime.

It is not an unprimeable number, because it can be changed into a prime (6986125541) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 688930 + ... + 698996.

It is an arithmetic number, because the mean of its divisors is an integer number (426027420).

Almost surely, 2^6986125521 is an apocalyptic number.

It is an amenable number.

6986125521 is a deficient number, since it is larger than the sum of its proper divisors (3238532559).

6986125521 is a wasteful number, since it uses less digits than its factorization.

6986125521 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11085 (or 11082 counting only the distinct ones).

The product of its digits is 259200, while the sum is 45.

The square root of 6986125521 is about 83583.0456552045. The cubic root of 6986125521 is about 1911.6664933359. Note that the first 3 decimals are identical.

The spelling of 6986125521 in words is "six billion, nine hundred eighty-six million, one hundred twenty-five thousand, five hundred twenty-one".