690636543894 has 24 divisors (see below), whose sum is σ = 1632413649672. Its totient is φ = 209283801120.

The previous prime is 690636543887. The next prime is 690636543913. The reversal of 690636543894 is 498345636096.

It is a happy number.

690636543894 is a `hidden beast` number, since 6 + 9 + 0 + 6 + 3 + 6 + 543 + 89 + 4 = 666.

It is a congruent number.

It is an unprimeable number.

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 11 ways as a sum of consecutive naturals, for example, 1744031479 + ... + 1744031874.

It is an arithmetic number, because the mean of its divisors is an integer number (68017235403).

Almost surely, 2^690636543894 is an apocalyptic number.

690636543894 is an abundant number, since it is smaller than the sum of its proper divisors (941777105778).

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

690636543894 is a wasteful number, since it uses less digits than its factorization.

690636543894 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3488063372 (or 3488063369 counting only the distinct ones).

The product of its (nonzero) digits is 100776960, while the sum is 63.

The spelling of 690636543894 in words is "six hundred ninety billion, six hundred thirty-six million, five hundred forty-three thousand, eight hundred ninety-four".