12815613202156 has 6 divisors (see below), whose sum is σ = 22427323103780. Its totient is φ = 6407806601076.

The previous prime is 12815613202151. The next prime is 12815613202157. The reversal of 12815613202156 is 65120231651821.

It is a super-3 number, since 3×12815613202156³ (a number of 40 digits) contains 333 as substring.

It is not an unprimeable number, because it can be changed into a prime (12815613202151) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1601951650266 + ... + 1601951650273.

Almost surely, 2^{12815613202156} is an apocalyptic number.

It is an amenable number.

12815613202156 is a deficient number, since it is larger than the sum of its proper divisors (9611709901624).

12815613202156 is a wasteful number, since it uses less digits than its factorization.

12815613202156 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3203903300543 (or 3203903300541 counting only the distinct ones).

The product of its (nonzero) digits is 172800, while the sum is 43.

Adding to 12815613202156 its reverse (65120231651821), we get a palindrome (77935844853977).

The spelling of 12815613202156 in words is "twelve trillion, eight hundred fifteen billion, six hundred thirteen million, two hundred two thousand, one hundred fifty-six".