12456509716 has 36 divisors (see below), whose sum is σ = 25365240768. Its totient is φ = 5336957808.

The previous prime is 12456509711. The next prime is 12456509743. The reversal of 12456509716 is 61790565421.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12456509711) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 895285 + ... + 909091.

Almost surely, 2^12456509716 is an apocalyptic number.

It is an amenable number.

12456509716 is an abundant number, since it is smaller than the sum of its proper divisors (12908731052).

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

12456509716 is a wasteful number, since it uses less digits than its factorization.

12456509716 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18428 (or 18419 counting only the distinct ones).

The product of its (nonzero) digits is 453600, while the sum is 46.

The spelling of 12456509716 in words is "twelve billion, four hundred fifty-six million, five hundred nine thousand, seven hundred sixteen".