78444252122 has 16 divisors (see below), whose sum is σ = 120555595944. Its totient is φ = 38259360000.

The previous prime is 78444252113. The next prime is 78444252191. The reversal of 78444252122 is 22125244487.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 72140050921 + 6304201201 = 268589^2 + 79399^2 .

It is a Harshad number since it is a multiple of its sum of digits (41).

It is a self number, because there is not a number n which added to its sum of digits gives 78444252122.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 461372 + ... + 608072.

Almost surely, 2^78444252122 is an apocalyptic number.

78444252122 is a deficient number, since it is larger than the sum of its proper divisors (42111343822).

78444252122 is a wasteful number, since it uses less digits than its factorization.

78444252122 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 153265.

The product of its digits is 286720, while the sum is 41.

The spelling of 78444252122 in words is "seventy-eight billion, four hundred forty-four million, two hundred fifty-two thousand, one hundred twenty-two".