15649463449 has 8 divisors (see below), whose sum is σ = 16522007840. Its totient is φ = 14781807936.

The previous prime is 15649463413. The next prime is 15649463477. The reversal of 15649463449 is 94436494651.

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 15649463449 - 2⁷ = 15649463321 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 15649463449.

It is not an unprimeable number, because it can be changed into a prime (15649463149) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1215639 + ... + 1228444.

It is an arithmetic number, because the mean of its divisors is an integer number (2065250980).

Almost surely, 2^15649463449 is an apocalyptic number.

15649463449 is a gapful number since it is divisible by the number (19) formed by its first and last digit.

It is an amenable number.

15649463449 is a deficient number, since it is larger than the sum of its proper divisors (872544391).

15649463449 is a wasteful number, since it uses less digits than its factorization.

15649463449 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2444439.

The product of its digits is 11197440, while the sum is 55.

The spelling of 15649463449 in words is "fifteen billion, six hundred forty-nine million, four hundred sixty-three thousand, four hundred forty-nine".