2631161205112 has 96 divisors (see below), whose sum is σ = 5901783048720. Its totient is φ = 1086815098880.

The previous prime is 2631161205097. The next prime is 2631161205119. The reversal of 2631161205112 is 2115021611362.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2631161205119) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 212478 + ... + 2303794.

Almost surely, 2^{2631161205112} is an apocalyptic number.

2631161205112 is a gapful number since it is divisible by the number (22) 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 2631161205112, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2950891524360).

2631161205112 is an abundant number, since it is smaller than the sum of its proper divisors (3270621843608).

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

2631161205112 is a wasteful number, since it uses less digits than its factorization.

2631161205112 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2091409 (or 2091376 counting only the distinct ones).

The product of its (nonzero) digits is 4320, while the sum is 31.

Adding to 2631161205112 its reverse (2115021611362), we get a palindrome (4746182816474).

The spelling of 2631161205112 in words is "two trillion, six hundred thirty-one billion, one hundred sixty-one million, two hundred five thousand, one hundred twelve".