998955341686 has 4 divisors (see below), whose sum is σ = 1498433012532. Its totient is φ = 499477670842.

The previous prime is 998955341633. The next prime is 998955341687. The reversal of 998955341686 is 686143559899.

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (998955341687) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 249738835420 + ... + 249738835423.

It is an arithmetic number, because the mean of its divisors is an integer number (374608253133).

Almost surely, 2^998955341686 is an apocalyptic number.

998955341686 is a deficient number, since it is larger than the sum of its proper divisors (499477670846).

998955341686 is a wasteful number, since it uses less digits than its factorization.

998955341686 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 499477670845.

The product of its digits is 503884800, while the sum is 73.

The spelling of 998955341686 in words is "nine hundred ninety-eight billion, nine hundred fifty-five million, three hundred forty-one thousand, six hundred eighty-six".