78223202474 has 4 divisors (see below), whose sum is σ = 117334803714. Its totient is φ = 39111601236.

The previous prime is 78223202437. The next prime is 78223202513. The reversal of 78223202474 is 47420232287.

It is a happy number.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 72330337249 + 5892865225 = 268943^2 + 76765^2 .

It is a super-2 number, since 2×78223202474² (a number of 23 digits) contains 22 as substring.

It is a Curzon number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 19555800617 + ... + 19555800620.

Almost surely, 2^78223202474 is an apocalyptic number.

78223202474 is a deficient number, since it is larger than the sum of its proper divisors (39111601240).

78223202474 is a wasteful number, since it uses less digits than its factorization.

78223202474 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 39111601239.

The product of its (nonzero) digits is 301056, while the sum is 41.

The spelling of 78223202474 in words is "seventy-eight billion, two hundred twenty-three million, two hundred two thousand, four hundred seventy-four".