7878954673 has 4 divisors (see below), whose sum is σ = 7879195120. Its totient is φ = 7878714228.

The previous prime is 7878954659. The next prime is 7878954679. The reversal of 7878954673 is 3764598787.

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-7878954673 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (7878954679) 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, 61515 + ... + 139792.

It is an arithmetic number, because the mean of its divisors is an integer number (1969798780).

Almost surely, 2^7878954673 is an apocalyptic number.

It is an amenable number.

7878954673 is a deficient number, since it is larger than the sum of its proper divisors (240447).

7878954673 is a wasteful number, since it uses less digits than its factorization.

7878954673 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 240446.

The product of its digits is 71124480, while the sum is 64.

The square root of 7878954673 is about 88763.4760078716. The cubic root of 7878954673 is about 1989.8615825039.

The spelling of 7878954673 in words is "seven billion, eight hundred seventy-eight million, nine hundred fifty-four thousand, six hundred seventy-three".