15645650656 has 12 divisors (see below), whose sum is σ = 30802374792. Its totient is φ = 7822825312.

The previous prime is 15645650639. The next prime is 15645650659. The reversal of 15645650656 is 65605654651.

15645650656 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (15645650659) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 244463260 + ... + 244463323.

It is an arithmetic number, because the mean of its divisors is an integer number (2566864566).

Almost surely, 2^15645650656 is an apocalyptic number.

15645650656 is a gapful number since it is divisible by the number (16) formed by its first and last digit.

It is an amenable number.

15645650656 is a deficient number, since it is larger than the sum of its proper divisors (15156724136).

15645650656 is an equidigital number, since it uses as much as digits as its factorization.

15645650656 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 488926593 (or 488926585 counting only the distinct ones).

The product of its (nonzero) digits is 3240000, while the sum is 49.

The spelling of 15645650656 in words is "fifteen billion, six hundred forty-five million, six hundred fifty thousand, six hundred fifty-six".