12649728783 has 8 divisors (see below), whose sum is σ = 17142802096. Its totient is φ = 8294904000.

The previous prime is 12649728779. The next prime is 12649728799. The reversal of 12649728783 is 38782794621.

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

It is not a de Polignac number, because 12649728783 - 2² = 12649728779 is a prime.

It is a super-2 number, since 2×12649728783² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12649728733) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 34561918 + ... + 34562283.

It is an arithmetic number, because the mean of its divisors is an integer number (2142850262).

Almost surely, 2^12649728783 is an apocalyptic number.

12649728783 is a deficient number, since it is larger than the sum of its proper divisors (4493073313).

12649728783 is an equidigital number, since it uses as much as digits as its factorization.

12649728783 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 69124265.

The product of its digits is 8128512, while the sum is 57.

The spelling of 12649728783 in words is "twelve billion, six hundred forty-nine million, seven hundred twenty-eight thousand, seven hundred eighty-three".