6988408581 has 32 divisors (see below), whose sum is σ = 11729922048. Its totient is φ = 3595083840.

The previous prime is 6988408541. The next prime is 6988408589. The reversal of 6988408581 is 1858048896.

It is not a de Polignac number, because 6988408581 - 2¹¹ = 6988406533 is a prime.

It is a super-2 number, since 2×6988408581² = 97675708989988867122, which contains 22 as substring.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6988408589) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 123066 + ... + 170651.

It is an arithmetic number, because the mean of its divisors is an integer number (366560064).

Almost surely, 2^6988408581 is an apocalyptic number.

It is an amenable number.

6988408581 is a deficient number, since it is larger than the sum of its proper divisors (4741513467).

6988408581 is a wasteful number, since it uses less digits than its factorization.

6988408581 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 293841.

The product of its (nonzero) digits is 4423680, while the sum is 57.

The square root of 6988408581 is about 83596.7019744200. The cubic root of 6988408581 is about 1911.8747143278.

The spelling of 6988408581 in words is "six billion, nine hundred eighty-eight million, four hundred eight thousand, five hundred eighty-one".