12542451063172 has 24 divisors (see below), whose sum is σ = 22058962877336. Its totient is φ = 6239967902208.

The previous prime is 12542451063161. The next prime is 12542451063199. The reversal of 12542451063172 is 27136015424521.

It can be written as a sum of positive squares in 4 ways, for example, as 527520405636 + 12014930657536 = 726306^2 + 3466256^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 9061203 + ... + 10353274.

Almost surely, 2^{12542451063172} is an apocalyptic number.

It is an amenable number.

12542451063172 is a deficient number, since it is larger than the sum of its proper divisors (9516511814164).

12542451063172 is a wasteful number, since it uses less digits than its factorization.

12542451063172 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 19415287 (or 19415285 counting only the distinct ones).

The product of its (nonzero) digits is 403200, while the sum is 43.

Adding to 12542451063172 its reverse (27136015424521), we get a palindrome (39678466487693).

The spelling of 12542451063172 in words is "twelve trillion, five hundred forty-two billion, four hundred fifty-one million, sixty-three thousand, one hundred seventy-two".