5311123355512 has 128 divisors (see below), whose sum is σ = 10976422464000. Its totient is φ = 2394289497600.

The previous prime is 5311123355497. The next prime is 5311123355537. The reversal of 5311123355512 is 2155533211135.

It is a happy number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 690559587 + ... + 690567277.

It is an arithmetic number, because the mean of its divisors is an integer number (85753300500).

Almost surely, 2^{5311123355512} is an apocalyptic number.

5311123355512 is a gapful number since it is divisible by the number (52) 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 5311123355512, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (5488211232000).

5311123355512 is an abundant number, since it is smaller than the sum of its proper divisors (5665299108488).

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

5311123355512 is a wasteful number, since it uses less digits than its factorization.

5311123355512 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8517 (or 8513 counting only the distinct ones).

The product of its digits is 67500, while the sum is 37.

Adding to 5311123355512 its reverse (2155533211135), we get a palindrome (7466656566647).

The spelling of 5311123355512 in words is "five trillion, three hundred eleven billion, one hundred twenty-three million, three hundred fifty-five thousand, five hundred twelve".