991839013342 has 8 divisors (see below), whose sum is σ = 1535750730432. Its totient is φ = 479922103200.

The previous prime is 991839013283. The next prime is 991839013369. The reversal of 991839013342 is 243310938199.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a self number, because there is not a number n which added to its sum of digits gives 991839013342.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 7998701659 + ... + 7998701782.

It is an arithmetic number, because the mean of its divisors is an integer number (191968841304).

Almost surely, 2^991839013342 is an apocalyptic number.

991839013342 is a deficient number, since it is larger than the sum of its proper divisors (543911717090).

991839013342 is a wasteful number, since it uses less digits than its factorization.

991839013342 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15997403474.

The product of its (nonzero) digits is 1259712, while the sum is 52.

The spelling of 991839013342 in words is "nine hundred ninety-one billion, eight hundred thirty-nine million, thirteen thousand, three hundred forty-two".