15616434945 has 16 divisors (see below), whose sum is σ = 25010369280. Its totient is φ = 8320740864.

The previous prime is 15616434941. The next prime is 15616434971. The reversal of 15616434945 is 54943461651.

It is a happy number.

15616434945 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 15616434945 - 2² = 15616434941 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 15616434894 and 15616434903.

It is not an unprimeable number, because it can be changed into a prime (15616434941) 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 in 15 ways as a sum of consecutive naturals, for example, 485424 + ... + 516593.

It is an arithmetic number, because the mean of its divisors is an integer number (1563148080).

Almost surely, 2^15616434945 is an apocalyptic number.

15616434945 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

15616434945 is a deficient number, since it is larger than the sum of its proper divisors (9393934335).

15616434945 is a wasteful number, since it uses less digits than its factorization.

15616434945 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1003064.

The product of its digits is 1555200, while the sum is 48.

The spelling of 15616434945 in words is "fifteen billion, six hundred sixteen million, four hundred thirty-four thousand, nine hundred forty-five".