31631606104 has 128 divisors (see below), whose sum is σ = 73400463360. Its totient is φ = 12472270848.

The previous prime is 31631606099. The next prime is 31631606107. The reversal of 31631606104 is 40160613613.

It is a super-2 number, since 2×31631606104² (a number of 22 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (31631606107) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 7662489 + ... + 7666615.

It is an arithmetic number, because the mean of its divisors is an integer number (573441120).

Almost surely, 2^31631606104 is an apocalyptic number.

31631606104 is a gapful number since it is divisible by the number (34) 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 31631606104, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (36700231680).

31631606104 is an abundant number, since it is smaller than the sum of its proper divisors (41768857256).

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

31631606104 is a wasteful number, since it uses less digits than its factorization.

31631606104 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4337 (or 4333 counting only the distinct ones).

The product of its (nonzero) digits is 7776, while the sum is 31.

The spelling of 31631606104 in words is "thirty-one billion, six hundred thirty-one million, six hundred six thousand, one hundred four".