15964425649 has 8 divisors (see below), whose sum is σ = 16664740992. Its totient is φ = 15264627840.

The previous prime is 15964425647. The next prime is 15964425661. The reversal of 15964425649 is 94652446951.

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

It is a cyclic number.

It is not a de Polignac number, because 15964425649 - 2¹ = 15964425647 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 15964425649.

It is not an unprimeable number, because it can be changed into a prime (15964425647) 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, 65664 + ... + 190369.

It is an arithmetic number, because the mean of its divisors is an integer number (2083092624).

Almost surely, 2^15964425649 is an apocalyptic number.

It is an amenable number.

15964425649 is a deficient number, since it is larger than the sum of its proper divisors (700315343).

15964425649 is a wasteful number, since it uses less digits than its factorization.

15964425649 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 258767.

The product of its digits is 9331200, while the sum is 55.

The spelling of 15964425649 in words is "fifteen billion, nine hundred sixty-four million, four hundred twenty-five thousand, six hundred forty-nine".