511223444363156 has 12 divisors (see below), whose sum is σ = 1022446888726368. Its totient is φ = 219095761869912.

The previous prime is 511223444363083. The next prime is 511223444363173. The reversal of 511223444363156 is 651363444322115.

It is a happy number.

511223444363156 is an admirable number.

It is a super-2 number, since 2×511223444363156² (a number of 30 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 3 ways as a sum of consecutive naturals, for example, 9128990077886 + ... + 9128990077941.

It is an arithmetic number, because the mean of its divisors is an integer number (85203907393864).

Almost surely, 2^{511223444363156} is an apocalyptic number.

It is an amenable number.

511223444363156 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

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

511223444363156 is a wasteful number, since it uses less digits than its factorization.

511223444363156 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18257980155838 (or 18257980155836 counting only the distinct ones).

The product of its digits is 6220800, while the sum is 50.

The spelling of 511223444363156 in words is "five hundred eleven trillion, two hundred twenty-three billion, four hundred forty-four million, three hundred sixty-three thousand, one hundred fifty-six".