12917212776 has 256 divisors, whose sum is σ = 40914720000. Its totient is φ = 3743179776.

The previous prime is 12917212769. The next prime is 12917212787. The reversal of 12917212776 is 67721271921.

It is an unprimeable number.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 10509730 + ... + 10510958.

It is an arithmetic number, because the mean of its divisors is an integer number (159823125).

Almost surely, 2^12917212776 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 12917212776, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (20457360000).

12917212776 is an abundant number, since it is smaller than the sum of its proper divisors (27997507224).

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

12917212776 is a wasteful number, since it uses less digits than its factorization.

12917212776 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1473 (or 1463 counting only the distinct ones).

The product of its digits is 148176, while the sum is 45.

The spelling of 12917212776 in words is "twelve billion, nine hundred seventeen million, two hundred twelve thousand, seven hundred seventy-six".