15645075855 has 16 divisors (see below), whose sum is σ = 26349601920. Its totient is φ = 7904880288.

The previous prime is 15645075827. The next prime is 15645075871. The reversal of 15645075855 is 55857054651.

It is a happy number.

15645075855 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 15645075855 - 2¹² = 15645071759 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 15645075798 and 15645075807.

It is a congruent number.

It is an unprimeable number.

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, 27447217 + ... + 27447786.

It is an arithmetic number, because the mean of its divisors is an integer number (1646850120).

Almost surely, 2^15645075855 is an apocalyptic number.

15645075855 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

15645075855 is a deficient number, since it is larger than the sum of its proper divisors (10704526065).

15645075855 is a wasteful number, since it uses less digits than its factorization.

15645075855 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 54895030.

The product of its (nonzero) digits is 4200000, while the sum is 51.

The spelling of 15645075855 in words is "fifteen billion, six hundred forty-five million, seventy-five thousand, eight hundred fifty-five".