6986937386421 has 24 divisors (see below), whose sum is σ = 10164468385760. Its totient is φ = 4624742259936.

The previous prime is 6986937386381. The next prime is 6986937386437. The reversal of 6986937386421 is 1246837396896.

6986937386421 is a `hidden beast` number, since 6 + 9 + 86 + 93 + 7 + 38 + 6 + 421 = 666.

It is not a de Polignac number, because 6986937386421 - 2¹⁴ = 6986937370037 is a prime.

It is a Smith number, since the sum of its digits (72) coincides with the sum of the digits of its prime factors.

It is a Duffinian number.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 6986937386421.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6986937387421) 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, 4246111 + ... + 5657148.

Almost surely, 2^{6986937386421} is an apocalyptic number.

It is an amenable number.

6986937386421 is a deficient number, since it is larger than the sum of its proper divisors (3177530999339).

6986937386421 is a wasteful number, since it uses less digits than its factorization.

6986937386421 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9903825 (or 9903822 counting only the distinct ones).

The product of its digits is 564350976, while the sum is 72.

The spelling of 6986937386421 in words is "six trillion, nine hundred eighty-six billion, nine hundred thirty-seven million, three hundred eighty-six thousand, four hundred twenty-one".