921616091398 has 8 divisors (see below), whose sum is σ = 1397956992840. Its totient is φ = 455630427120.

The previous prime is 921616091381. The next prime is 921616091411. The reversal of 921616091398 is 893190616129.

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

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2588809068 + ... + 2588809423.

It is an arithmetic number, because the mean of its divisors is an integer number (174744624105).

Almost surely, 2^921616091398 is an apocalyptic number.

921616091398 is a deficient number, since it is larger than the sum of its proper divisors (476340901442).

921616091398 is a wasteful number, since it uses less digits than its factorization.

921616091398 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5177618582.

The product of its (nonzero) digits is 1259712, while the sum is 55.

The spelling of 921616091398 in words is "nine hundred twenty-one billion, six hundred sixteen million, ninety-one thousand, three hundred ninety-eight".