12011511623 has 2 divisors, whose sum is σ = 12011511624. Its totient is φ = 12011511622.

The previous prime is 12011511607. The next prime is 12011511641. The reversal of 12011511623 is 32611511021.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 12011511623 - 2⁴ = 12011511607 is a prime.

It is a super-3 number, since 3×12011511623³ (a number of 31 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (12011511923) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6005755811 + 6005755812.

It is an arithmetic number, because the mean of its divisors is an integer number (6005755812).

Almost surely, 2^12011511623 is an apocalyptic number.

12011511623 is a deficient number, since it is larger than the sum of its proper divisors (1).

12011511623 is an equidigital number, since it uses as much as digits as its factorization.

12011511623 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 360, while the sum is 23.

The spelling of 12011511623 in words is "twelve billion, eleven million, five hundred eleven thousand, six hundred twenty-three".