78564541126422 has 128 divisors (see below), whose sum is σ = 172615044712320. Its totient is φ = 23689230888960.

The previous prime is 78564541126417. The next prime is 78564541126433. The reversal of 78564541126422 is 22462114546587.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 19365179418 + ... + 19365183474.

It is an arithmetic number, because the mean of its divisors is an integer number (1348555036815).

Almost surely, 2^{78564541126422} is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 78564541126422, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (86307522356160).

78564541126422 is an abundant number, since it is smaller than the sum of its proper divisors (94050503585898).

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

78564541126422 is a wasteful number, since it uses less digits than its factorization.

78564541126422 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8578.

The product of its digits is 25804800, while the sum is 57.

The spelling of 78564541126422 in words is "seventy-eight trillion, five hundred sixty-four billion, five hundred forty-one million, one hundred twenty-six thousand, four hundred twenty-two".