31791216398 has 8 divisors (see below), whose sum is σ = 47688264000. Its totient is φ = 15895128400.

The previous prime is 31791216323. The next prime is 31791216427. The reversal of 31791216398 is 89361219713.

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 polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 150398 + ... + 293601.

It is an arithmetic number, because the mean of its divisors is an integer number (5961033000).

Almost surely, 2^31791216398 is an apocalyptic number.

31791216398 is a deficient number, since it is larger than the sum of its proper divisors (15897047602).

31791216398 is a wasteful number, since it uses less digits than its factorization.

31791216398 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 479802.

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

The spelling of 31791216398 in words is "thirty-one billion, seven hundred ninety-one million, two hundred sixteen thousand, three hundred ninety-eight".