12526640816 has 20 divisors (see below), whose sum is σ = 24506004432. Its totient is φ = 6202510656.

The previous prime is 12526640813. The next prime is 12526640827. The reversal of 12526640816 is 61804662521.

It is not an unprimeable number, because it can be changed into a prime (12526640813) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3798911 + ... + 3802206.

Almost surely, 2^12526640816 is an apocalyptic number.

12526640816 is a gapful number since it is divisible by the number (16) formed by its first and last digit.

It is an amenable number.

12526640816 is a deficient number, since it is larger than the sum of its proper divisors (11979363616).

12526640816 is a wasteful number, since it uses less digits than its factorization.

12526640816 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7601228 (or 7601222 counting only the distinct ones).

The product of its (nonzero) digits is 138240, while the sum is 41.

The spelling of 12526640816 in words is "twelve billion, five hundred twenty-six million, six hundred forty thousand, eight hundred sixteen".