991740900038 has 8 divisors (see below), whose sum is σ = 1700127257232. Its totient is φ = 425031814296.

The previous prime is 991740899977. The next prime is 991740900043. The reversal of 991740900038 is 830009047199.

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

It is a Curzon number.

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, 35419317845 + ... + 35419317872.

It is an arithmetic number, because the mean of its divisors is an integer number (212515907154).

Almost surely, 2^991740900038 is an apocalyptic number.

991740900038 is a deficient number, since it is larger than the sum of its proper divisors (708386357194).

991740900038 is a wasteful number, since it uses less digits than its factorization.

991740900038 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 70838635726.

The product of its (nonzero) digits is 489888, while the sum is 50.

The spelling of 991740900038 in words is "nine hundred ninety-one billion, seven hundred forty million, nine hundred thousand, thirty-eight".