15216122649 has 16 divisors (see below), whose sum is σ = 24970047872. Its totient is φ = 8026086528.

The previous prime is 15216122641. The next prime is 15216122653. The reversal of 15216122649 is 94622161251.

It is not a de Polignac number, because 15216122649 - 2³ = 15216122641 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (39).

It is not an unprimeable number, because it can be changed into a prime (15216122641) 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 15 ways as a sum of consecutive naturals, for example, 27868084 + ... + 27868629.

It is an arithmetic number, because the mean of its divisors is an integer number (1560627992).

Almost surely, 2^15216122649 is an apocalyptic number.

It is an amenable number.

15216122649 is a deficient number, since it is larger than the sum of its proper divisors (9753925223).

15216122649 is a wasteful number, since it uses less digits than its factorization.

15216122649 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 55736736.

The product of its digits is 51840, while the sum is 39.

The spelling of 15216122649 in words is "fifteen billion, two hundred sixteen million, one hundred twenty-two thousand, six hundred forty-nine".