691863002106 has 16 divisors (see below), whose sum is σ = 1383884593248. Its totient is φ = 230594569200.

The previous prime is 691863002069. The next prime is 691863002111. The reversal of 691863002106 is 601200368196.

It is an unprimeable number.

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 7 ways as a sum of consecutive naturals, for example, 6551125 + ... + 6655896.

It is an arithmetic number, because the mean of its divisors is an integer number (86492787078).

Almost surely, 2^691863002106 is an apocalyptic number.

691863002106 is an abundant number, since it is smaller than the sum of its proper divisors (692021591142).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

691863002106 is a wasteful number, since it uses less digits than its factorization.

691863002106 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13215757.

The product of its (nonzero) digits is 93312, while the sum is 42.

The spelling of 691863002106 in words is "six hundred ninety-one billion, eight hundred sixty-three million, two thousand, one hundred six".