31111064512 has 224 divisors, whose sum is σ = 73993248000. Its totient is φ = 12819824640.

The previous prime is 31111064503. The next prime is 31111064519. The reversal of 31111064512 is 21546011113.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (31111064519) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 53918368 + ... + 53918944.

It is an arithmetic number, because the mean of its divisors is an integer number (330327000).

Almost surely, 2^31111064512 is an apocalyptic number.

31111064512 is a gapful number since it is divisible by the number (32) 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 31111064512, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (36996624000).

31111064512 is an abundant number, since it is smaller than the sum of its proper divisors (42882183488).

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

31111064512 is a wasteful number, since it uses less digits than its factorization.

31111064512 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 787 (or 777 counting only the distinct ones).

The product of its (nonzero) digits is 720, while the sum is 25.

Adding to 31111064512 its reverse (21546011113), we get a palindrome (52657075625).

The spelling of 31111064512 in words is "thirty-one billion, one hundred eleven million, sixty-four thousand, five hundred twelve".