6991904463 has 16 divisors (see below), whose sum is σ = 9416943360. Its totient is φ = 4614259136.

The previous prime is 6991904419. The next prime is 6991904473. The reversal of 6991904463 is 3644091996.

It is a cyclic number.

It is not a de Polignac number, because 6991904463 - 2⁶ = 6991904399 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6991904473) 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 15 ways as a sum of consecutive naturals, for example, 123856 + ... + 171242.

It is an arithmetic number, because the mean of its divisors is an integer number (588558960).

Almost surely, 2^6991904463 is an apocalyptic number.

6991904463 is a deficient number, since it is larger than the sum of its proper divisors (2425038897).

6991904463 is a wasteful number, since it uses less digits than its factorization.

6991904463 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 47886.

The product of its (nonzero) digits is 1259712, while the sum is 51.

The square root of 6991904463 is about 83617.6085702049. The cubic root of 6991904463 is about 1912.1934599645.

The spelling of 6991904463 in words is "six billion, nine hundred ninety-one million, nine hundred four thousand, four hundred sixty-three".