78586867380 has 144 divisors (see below), whose sum is σ = 256210093440. Its totient is φ = 17945770752.

The previous prime is 78586867369. The next prime is 78586867543. The reversal of 78586867380 is 8376868587.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 3248409 + ... + 3272511.

It is an arithmetic number, because the mean of its divisors is an integer number (1779236760).

Almost surely, 2^78586867380 is an apocalyptic number.

78586867380 is a gapful number since it is divisible by the number (70) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 78586867380, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (128105046720).

78586867380 is an abundant number, since it is smaller than the sum of its proper divisors (177623226060).

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

78586867380 is a wasteful number, since it uses less digits than its factorization.

78586867380 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 25238 (or 25229 counting only the distinct ones).

The product of its (nonzero) digits is 108380160, while the sum is 66.

The spelling of 78586867380 in words is "seventy-eight billion, five hundred eighty-six million, eight hundred sixty-seven thousand, three hundred eighty".