15689734145 has 8 divisors (see below), whose sum is σ = 19085594856. Its totient is φ = 12379844736.

The previous prime is 15689734133. The next prime is 15689734171. The reversal of 15689734145 is 54143798651.

It can be written as a sum of positive squares in 4 ways, for example, as 6273748849 + 9415985296 = 79207^2 + 97036^2 .

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 15689734145 - 2²² = 15685539841 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 21492422 + ... + 21493151.

It is an arithmetic number, because the mean of its divisors is an integer number (2385699357).

Almost surely, 2^15689734145 is an apocalyptic number.

It is an amenable number.

15689734145 is a deficient number, since it is larger than the sum of its proper divisors (3395860711).

15689734145 is an equidigital number, since it uses as much as digits as its factorization.

15689734145 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 42985651.

The product of its digits is 3628800, while the sum is 53.

The spelling of 15689734145 in words is "fifteen billion, six hundred eighty-nine million, seven hundred thirty-four thousand, one hundred forty-five".