15105505645 has 16 divisors (see below), whose sum is σ = 19566956160. Its totient is φ = 11160407104.

The previous prime is 15105505631. The next prime is 15105505651. The reversal of 15105505645 is 54650550151.

It is a cyclic number.

It is not a de Polignac number, because 15105505645 - 2⁹ = 15105505133 is a prime.

It is a super-3 number, since 3×15105505645³ (a number of 32 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

It is a congruent number.

It is an unprimeable number.

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, 2261359 + ... + 2268028.

It is an arithmetic number, because the mean of its divisors is an integer number (1222934760).

Almost surely, 2^15105505645 is an apocalyptic number.

It is an amenable number.

15105505645 is a deficient number, since it is larger than the sum of its proper divisors (4461450515).

15105505645 is a wasteful number, since it uses less digits than its factorization.

15105505645 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4529444.

The product of its (nonzero) digits is 75000, while the sum is 37.

The spelling of 15105505645 in words is "fifteen billion, one hundred five million, five hundred five thousand, six hundred forty-five".