78224919706 has 8 divisors (see below), whose sum is σ = 117339091380. Its totient is φ = 39111889248.

The previous prime is 78224919701. The next prime is 78224919709. The reversal of 78224919706 is 60791942287.

It can be written as a sum of positive squares in 2 ways, for example, as 73880132481 + 4344787225 = 271809^2 + 65915^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a super-2 number, since 2×78224919706² (a number of 23 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (78224919701) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 86131 + ... + 404806.

Almost surely, 2^78224919706 is an apocalyptic number.

78224919706 is a deficient number, since it is larger than the sum of its proper divisors (39114171674).

78224919706 is a wasteful number, since it uses less digits than its factorization.

78224919706 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 570608.

The product of its (nonzero) digits is 3048192, while the sum is 55.

The spelling of 78224919706 in words is "seventy-eight billion, two hundred twenty-four million, nine hundred nineteen thousand, seven hundred six".