31109149008 has 900 divisors, whose sum is σ = 117303072480. Its totient is φ = 7917896448.

The previous prime is 31109149003. The next prime is 31109149061. The reversal of 31109149008 is 80094190113.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (31109149003) by changing a digit.

It is a polite number, since it can be written in 179 ways as a sum of consecutive naturals, for example, 527273683 + ... + 527273741.

Almost surely, 2^31109149008 is an apocalyptic number.

31109149008 is a gapful number since it is divisible by the number (38) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 31109149008, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (58651536240).

31109149008 is an abundant number, since it is smaller than the sum of its proper divisors (86193923472).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

31109149008 is a wasteful number, since it uses less digits than its factorization.

31109149008 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 154 (or 113 counting only the distinct ones).

The product of its (nonzero) digits is 7776, while the sum is 36.

The spelling of 31109149008 in words is "thirty-one billion, one hundred nine million, one hundred forty-nine thousand, eight".