15009747985 has 8 divisors (see below), whose sum is σ = 18053297640. Its totient is φ = 11980065024.

The previous prime is 15009747953. The next prime is 15009748009. The reversal of 15009747985 is 58974790051.

It is a happy number.

15009747985 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 4 ways, for example, as 800154369 + 14209593616 = 28287^2 + 119204^2 .

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 15009747985 - 2⁵ = 15009747953 is a prime.

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 7 ways as a sum of consecutive naturals, for example, 3464290 + ... + 3468619.

It is an arithmetic number, because the mean of its divisors is an integer number (2256662205).

Almost surely, 2^15009747985 is an apocalyptic number.

It is an amenable number.

15009747985 is a deficient number, since it is larger than the sum of its proper divisors (3043549655).

15009747985 is an equidigital number, since it uses as much as digits as its factorization.

15009747985 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6933347.

The product of its (nonzero) digits is 3175200, while the sum is 55.

The spelling of 15009747985 in words is "fifteen billion, nine million, seven hundred forty-seven thousand, nine hundred eighty-five".