15854132115845 has 8 divisors (see below), whose sum is σ = 19539146607864. Its totient is φ = 12340513646784.

The previous prime is 15854132115841. The next prime is 15854132115851. The reversal of 15854132115845 is 54851123145851.

It can be written as a sum of positive squares in 4 ways, for example, as 4819258668961 + 11034873446884 = 2195281^2 + 3321878^2 .

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 15854132115845 - 2² = 15854132115841 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (15854132115841) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 42849005534 + ... + 42849005903.

It is an arithmetic number, because the mean of its divisors is an integer number (2442393325983).

Almost surely, 2^{15854132115845} is an apocalyptic number.

It is an amenable number.

15854132115845 is a deficient number, since it is larger than the sum of its proper divisors (3685014492019).

15854132115845 is an equidigital number, since it uses as much as digits as its factorization.

15854132115845 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 85698011479.

The product of its digits is 3840000, while the sum is 53.

The spelling of 15854132115845 in words is "fifteen trillion, eight hundred fifty-four billion, one hundred thirty-two million, one hundred fifteen thousand, eight hundred forty-five".