513161111544 has 32 divisors (see below), whose sum is σ = 1283303502720. Its totient is φ = 171000274016.

The previous prime is 513161111539. The next prime is 513161111569. The reversal of 513161111544 is 445111161315.

It is a happy number.

It is a super-2 number, since 2×513161111544² (a number of 24 digits) contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3260892 + ... + 3414635.

It is an arithmetic number, because the mean of its divisors is an integer number (40103234460).

Almost surely, 2^513161111544 is an apocalyptic number.

It is an amenable number.

513161111544 is an abundant number, since it is smaller than the sum of its proper divisors (770142391176).

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

513161111544 is a wasteful number, since it uses less digits than its factorization.

513161111544 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6678739 (or 6678735 counting only the distinct ones).

The product of its digits is 7200, while the sum is 33.

Adding to 513161111544 its reverse (445111161315), we get a palindrome (958272272859).

The spelling of 513161111544 in words is "five hundred thirteen billion, one hundred sixty-one million, one hundred eleven thousand, five hundred forty-four".