409143618694 has 4 divisors (see below), whose sum is σ = 613715428044. Its totient is φ = 204571809346.

The previous prime is 409143618671. The next prime is 409143618727. The reversal of 409143618694 is 496816341904.

It is a semiprime because it is the product of two primes.

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 as a sum of consecutive naturals, namely, 102285904672 + ... + 102285904675.

It is an arithmetic number, because the mean of its divisors is an integer number (153428857011).

Almost surely, 2^409143618694 is an apocalyptic number.

409143618694 is a deficient number, since it is larger than the sum of its proper divisors (204571809350).

409143618694 is a wasteful number, since it uses less digits than its factorization.

409143618694 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 204571809349.

The product of its (nonzero) digits is 4478976, while the sum is 55.

The spelling of 409143618694 in words is "four hundred nine billion, one hundred forty-three million, six hundred eighteen thousand, six hundred ninety-four".