123511530388 has 12 divisors (see below), whose sum is σ = 217265102740. Its totient is φ = 61435786752.

The previous prime is 123511530383. The next prime is 123511530419. The reversal of 123511530388 is 883035115321.

It can be written as a sum of positive squares in 2 ways, for example, as 55879286544 + 67632243844 = 236388^2 + 260062^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 123511530388.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (123511530383) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 79993743 + ... + 79995286.

Almost surely, 2^123511530388 is an apocalyptic number.

It is an amenable number.

123511530388 is a deficient number, since it is larger than the sum of its proper divisors (93753572352).

123511530388 is a wasteful number, since it uses less digits than its factorization.

123511530388 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 159989226 (or 159989224 counting only the distinct ones).

The product of its (nonzero) digits is 86400, while the sum is 40.

The spelling of 123511530388 in words is "one hundred twenty-three billion, five hundred eleven million, five hundred thirty thousand, three hundred eighty-eight".