7678854918 has 96 divisors (see below), whose sum is σ = 19793679360. Its totient is φ = 2185600320.

The previous prime is 7678854917. The next prime is 7678854919. The reversal of 7678854918 is 8194588767.

7678854918 is a `hidden beast` number, since 7 + 6 + 7 + 88 + 549 + 1 + 8 = 666.

It is an interprime number because it is at equal distance from previous prime (7678854917) and next prime (7678854919).

It is a Harshad number since it is a multiple of its sum of digits (63).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (7678854913) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 917778 + ... + 926106.

It is an arithmetic number, because the mean of its divisors is an integer number (206184160).

Almost surely, 2^7678854918 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 7678854918, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (9896839680).

7678854918 is an abundant number, since it is smaller than the sum of its proper divisors (12114824442).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

7678854918 is a wasteful number, since it uses less digits than its factorization.

7678854918 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8624 (or 8612 counting only the distinct ones).

The product of its digits is 27095040, while the sum is 63.

The square root of 7678854918 is about 87629.0757568514. The cubic root of 7678854918 is about 1972.8715985123.

The spelling of 7678854918 in words is "seven billion, six hundred seventy-eight million, eight hundred fifty-four thousand, nine hundred eighteen".