78805215430 has 16 divisors (see below), whose sum is σ = 142932209904. Its totient is φ = 31281459040.

The previous prime is 78805215383. The next prime is 78805215439. The reversal of 78805215430 is 3451250887.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (78805215439) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 30077017 + ... + 30079636.

It is an arithmetic number, because the mean of its divisors is an integer number (8933263119).

Almost surely, 2^78805215430 is an apocalyptic number.

78805215430 is a deficient number, since it is larger than the sum of its proper divisors (64126994474).

78805215430 is a wasteful number, since it uses less digits than its factorization.

78805215430 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 60156791.

The product of its (nonzero) digits is 268800, while the sum is 43.

The spelling of 78805215430 in words is "seventy-eight billion, eight hundred five million, two hundred fifteen thousand, four hundred thirty".