78508206402 has 16 divisors (see below), whose sum is σ = 157359999072. Its totient is φ = 26112137760.

The previous prime is 78508206383. The next prime is 78508206409. The reversal of 78508206402 is 20460280587.

It is a happy number.

It is not an unprimeable number, because it can be changed into a prime (78508206409) 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, 14313124 + ... + 14318607.

It is an arithmetic number, because the mean of its divisors is an integer number (9834999942).

Almost surely, 2^78508206402 is an apocalyptic number.

78508206402 is an abundant number, since it is smaller than the sum of its proper divisors (78851792670).

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

78508206402 is a wasteful number, since it uses less digits than its factorization.

78508206402 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 28632193.

The product of its (nonzero) digits is 215040, while the sum is 42.

Adding to 78508206402 its reverse (20460280587), we get a palindrome (98968486989).

The spelling of 78508206402 in words is "seventy-eight billion, five hundred eight million, two hundred six thousand, four hundred two".