31118399489 has 8 divisors (see below), whose sum is σ = 32106879360. Its totient is φ = 30144784176.

The previous prime is 31118399467. The next prime is 31118399497. The reversal of 31118399489 is 98499381113.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-31118399489 is a prime.

It is a super-2 number, since 2×31118399489² (a number of 22 digits) contains 22 as substring.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (31118399419) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3711887 + ... + 3720260.

It is an arithmetic number, because the mean of its divisors is an integer number (4013359920).

Almost surely, 2^31118399489 is an apocalyptic number.

It is an amenable number.

31118399489 is a deficient number, since it is larger than the sum of its proper divisors (988479871).

31118399489 is an equidigital number, since it uses as much as digits as its factorization.

31118399489 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7432279.

The product of its digits is 1679616, while the sum is 56.

The spelling of 31118399489 in words is "thirty-one billion, one hundred eighteen million, three hundred ninety-nine thousand, four hundred eighty-nine".