12649728782 has 8 divisors (see below), whose sum is σ = 18975071016. Its totient is φ = 6324705112.

The previous prime is 12649728779. The next prime is 12649728799. The reversal of 12649728782 is 28782794621.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 108953 + ... + 192795.

It is an arithmetic number, because the mean of its divisors is an integer number (2371883877).

Almost surely, 2^12649728782 is an apocalyptic number.

12649728782 is a deficient number, since it is larger than the sum of its proper divisors (6325342234).

12649728782 is an equidigital number, since it uses as much as digits as its factorization.

12649728782 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 159282.

The product of its digits is 5419008, while the sum is 56.

The spelling of 12649728782 in words is "twelve billion, six hundred forty-nine million, seven hundred twenty-eight thousand, seven hundred eighty-two".