8978134465 has 4 divisors (see below), whose sum is σ = 10773761364. Its totient is φ = 7182507568.

The previous prime is 8978134457. The next prime is 8978134507. The reversal of 8978134465 is 5644318798.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 5644318798 = 2 ⋅2822159399.

It can be written as a sum of positive squares in 2 ways, for example, as 7002509761 + 1975624704 = 83681^2 + 44448^2 .

It is a cyclic number.

It is not a de Polignac number, because 8978134465 - 2³ = 8978134457 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 897813442 + ... + 897813451.

It is an arithmetic number, because the mean of its divisors is an integer number (2693440341).

Almost surely, 2^8978134465 is an apocalyptic number.

It is an amenable number.

8978134465 is a deficient number, since it is larger than the sum of its proper divisors (1795626899).

8978134465 is a wasteful number, since it uses less digits than its factorization.

8978134465 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1795626898.

The product of its digits is 5806080, while the sum is 55.

The square root of 8978134465 is about 94753.0182368878. The cubic root of 8978134465 is about 2078.3979331094.

The spelling of 8978134465 in words is "eight billion, nine hundred seventy-eight million, one hundred thirty-four thousand, four hundred sixty-five".