991616334245 has 8 divisors (see below), whose sum is σ = 1189954563480. Its totient is φ = 793283092480.

The previous prime is 991616334227. The next prime is 991616334281. The reversal of 991616334245 is 542433616199.

It can be written as a sum of positive squares in 4 ways, for example, as 54280612324 + 937335721921 = 232982^2 + 968161^2 .

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

It is not a de Polignac number, because 991616334245 - 2¹⁰ = 991616333221 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 794540 + ... + 1616949.

It is an arithmetic number, because the mean of its divisors is an integer number (148744320435).

Almost surely, 2^991616334245 is an apocalyptic number.

It is an amenable number.

991616334245 is a deficient number, since it is larger than the sum of its proper divisors (198338229235).

991616334245 is a wasteful number, since it uses less digits than its factorization.

991616334245 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2493735.

The product of its digits is 4199040, while the sum is 53.

The spelling of 991616334245 in words is "nine hundred ninety-one billion, six hundred sixteen million, three hundred thirty-four thousand, two hundred forty-five".