12506801640 has 32 divisors (see below), whose sum is σ = 37520405280. Its totient is φ = 3335147072.

The previous prime is 12506801639. The next prime is 12506801647. The reversal of 12506801640 is 4610860521.

It is not an unprimeable number, because it can be changed into a prime (12506801647) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 52111554 + ... + 52111793.

It is an arithmetic number, because the mean of its divisors is an integer number (1172512665).

Almost surely, 2^12506801640 is an apocalyptic number.

12506801640 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

12506801640 is an abundant number, since it is smaller than the sum of its proper divisors (25013603640).

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

12506801640 is a wasteful number, since it uses less digits than its factorization.

12506801640 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 104223361 (or 104223357 counting only the distinct ones).

The product of its (nonzero) digits is 11520, while the sum is 33.

The spelling of 12506801640 in words is "twelve billion, five hundred six million, eight hundred one thousand, six hundred forty".