6987408892491 has 8 divisors (see below), whose sum is σ = 9434476142080. Its totient is φ = 4599307118952.

The previous prime is 6987408892489. The next prime is 6987408892531. The reversal of 6987408892491 is 1942988047896.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 6987408892491 - 2¹ = 6987408892489 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (6987408892291) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 14741368735 + ... + 14741369208.

It is an arithmetic number, because the mean of its divisors is an integer number (1179309517760).

Almost surely, 2^{6987408892491} is an apocalyptic number.

6987408892491 is a deficient number, since it is larger than the sum of its proper divisors (2447067249589).

6987408892491 is a wasteful number, since it uses less digits than its factorization.

6987408892491 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 29482738025.

The product of its (nonzero) digits is 501645312, while the sum is 75.

The spelling of 6987408892491 in words is "six trillion, nine hundred eighty-seven billion, four hundred eight million, eight hundred ninety-two thousand, four hundred ninety-one".