15104451578217 has 4 divisors (see below), whose sum is σ = 20139268770960. Its totient is φ = 10069634385476.

The previous prime is 15104451578141. The next prime is 15104451578263. The reversal of 15104451578217 is 71287515440151.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 15104451578217 - 2⁷ = 15104451578089 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 15104451578217.

It is not an unprimeable number, because it can be changed into a prime (15104451478217) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2517408596367 + ... + 2517408596372.

It is an arithmetic number, because the mean of its divisors is an integer number (5034817192740).

Almost surely, 2^{15104451578217} is an apocalyptic number.

It is an amenable number.

15104451578217 is a deficient number, since it is larger than the sum of its proper divisors (5034817192743).

15104451578217 is an equidigital number, since it uses as much as digits as its factorization.

15104451578217 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5034817192742.

The product of its (nonzero) digits is 1568000, while the sum is 51.

The spelling of 15104451578217 in words is "fifteen trillion, one hundred four billion, four hundred fifty-one million, five hundred seventy-eight thousand, two hundred seventeen".