8978144528417 has 4 divisors (see below), whose sum is σ = 8989000810416. Its totient is φ = 8967288246420.

The previous prime is 8978144528389. The next prime is 8978144528491. The reversal of 8978144528417 is 7148254418798.

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 a de Polignac number, because none of the positive numbers 2^k-8978144528417 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (8978144528917) 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, 5428139759 + ... + 5428141412.

It is an arithmetic number, because the mean of its divisors is an integer number (2247250202604).

Almost surely, 2^{8978144528417} is an apocalyptic number.

It is an amenable number.

8978144528417 is a deficient number, since it is larger than the sum of its proper divisors (10856281999).

8978144528417 is a wasteful number, since it uses less digits than its factorization.

8978144528417 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10856281998.

The product of its digits is 144506880, while the sum is 68.

The spelling of 8978144528417 in words is "eight trillion, nine hundred seventy-eight billion, one hundred forty-four million, five hundred twenty-eight thousand, four hundred seventeen".