7864122378 has 64 divisors (see below), whose sum is σ = 19105320960. Its totient is φ = 2106630912.

The previous prime is 7864122373. The next prime is 7864122389. The reversal of 7864122378 is 8732214687.

It is not an unprimeable number, because it can be changed into a prime (7864122373) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 166843 + ... + 208721.

It is an arithmetic number, because the mean of its divisors is an integer number (298520640).

Almost surely, 2^7864122378 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 7864122378, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (9552660480).

7864122378 is an abundant number, since it is smaller than the sum of its proper divisors (11241198582).

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

7864122378 is a wasteful number, since it uses less digits than its factorization.

7864122378 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 42171.

The product of its digits is 903168, while the sum is 48.

The square root of 7864122378 is about 88679.8871108889. The cubic root of 7864122378 is about 1988.6121462951.

The spelling of 7864122378 in words is "seven billion, eight hundred sixty-four million, one hundred twenty-two thousand, three hundred seventy-eight".