12649620687739 has 64 divisors (see below), whose sum is σ = 15338532444160. Its totient is φ = 10190689367040.

The previous prime is 12649620687689. The next prime is 12649620687757. The reversal of 12649620687739 is 93778602694621.

12649620687739 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a de Polignac number, because none of the positive numbers 2^k-12649620687739 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (12649620687139) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 14423740369 + ... + 14423741245.

It is an arithmetic number, because the mean of its divisors is an integer number (239664569440).

Almost surely, 2^{12649620687739} is an apocalyptic number.

12649620687739 is a gapful number since it is divisible by the number (19) formed by its first and last digit.

12649620687739 is a deficient number, since it is larger than the sum of its proper divisors (2688911756421).

12649620687739 is a wasteful number, since it uses less digits than its factorization.

12649620687739 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2460.

The product of its (nonzero) digits is 329204736, while the sum is 70.

The spelling of 12649620687739 in words is "twelve trillion, six hundred forty-nine billion, six hundred twenty million, six hundred eighty-seven thousand, seven hundred thirty-nine".