78530568156534 has 96 divisors (see below), whose sum is σ = 170698518198144. Its totient is φ = 24074280622080.

The previous prime is 78530568156497. The next prime is 78530568156539. The reversal of 78530568156534 is 43565186503587.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (78530568156539) 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, 2429691094 + ... + 2429723414.

It is an arithmetic number, because the mean of its divisors is an integer number (1778109564564).

Almost surely, 2^{78530568156534} is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 78530568156534, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (85349259099072).

78530568156534 is an abundant number, since it is smaller than the sum of its proper divisors (92167950041610).

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

78530568156534 is a wasteful number, since it uses less digits than its factorization.

78530568156534 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 41102 (or 41089 counting only the distinct ones).

The product of its (nonzero) digits is 362880000, while the sum is 66.

The spelling of 78530568156534 in words is "seventy-eight trillion, five hundred thirty billion, five hundred sixty-eight million, one hundred fifty-six thousand, five hundred thirty-four".