78609040380 has 240 divisors, whose sum is σ = 265843648224. Its totient is φ = 19329891840.

The previous prime is 78609040361. The next prime is 78609040387. The reversal of 78609040380 is 8304090687.

It is a happy number.

78609040380 is a `hidden beast` number, since 7 + 8 + 609 + 0 + 4 + 0 + 38 + 0 = 666.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (78609040387) by changing a digit.

It is a polite number, since it can be written in 79 ways as a sum of consecutive naturals, for example, 40665894 + ... + 40667826.

Almost surely, 2^78609040380 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 78609040380, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (132921824112).

78609040380 is an abundant number, since it is smaller than the sum of its proper divisors (187234607844).

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

78609040380 is a wasteful number, since it uses less digits than its factorization.

78609040380 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3898 (or 3887 counting only the distinct ones).

The product of its (nonzero) digits is 290304, while the sum is 45.

The spelling of 78609040380 in words is "seventy-eight billion, six hundred nine million, forty thousand, three hundred eighty".