9949890518390 has 16 divisors (see below), whose sum is σ = 17918816458032. Its totient is φ = 3977953201824.

The previous prime is 9949890518377. The next prime is 9949890518461. The reversal of 9949890518390 is 938150989499.

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, 250354829 + ... + 250394568.

It is an arithmetic number, because the mean of its divisors is an integer number (1119926028627).

Almost surely, 2^{9949890518390} is an apocalyptic number.

9949890518390 is a deficient number, since it is larger than the sum of its proper divisors (7968925939642).

9949890518390 is a wasteful number, since it uses less digits than its factorization.

9949890518390 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 500751391.

The product of its (nonzero) digits is 226748160, while the sum is 74.

The spelling of 9949890518390 in words is "nine trillion, nine hundred forty-nine billion, eight hundred ninety million, five hundred eighteen thousand, three hundred ninety".