12155002636 has 24 divisors (see below), whose sum is σ = 24321417120. Its totient is φ = 5206841472.

The previous prime is 12155002627. The next prime is 12155002693. The reversal of 12155002636 is 63620055121.

It is a junction number, because it is equal to n+sod(n) for n = 12155002598 and 12155002607.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 40531 + ... + 161098.

It is an arithmetic number, because the mean of its divisors is an integer number (1013392380).

Almost surely, 2^12155002636 is an apocalyptic number.

It is an amenable number.

12155002636 is an abundant number, since it is smaller than the sum of its proper divisors (12166414484).

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

12155002636 is a wasteful number, since it uses less digits than its factorization.

12155002636 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 203793 (or 203791 counting only the distinct ones).

The product of its (nonzero) digits is 10800, while the sum is 31.

Adding to 12155002636 its reverse (63620055121), we get a palindrome (75775057757).

The spelling of 12155002636 in words is "twelve billion, one hundred fifty-five million, two thousand, six hundred thirty-six".