78444553953025 has 12 divisors (see below), whose sum is σ = 104753650510012. Its totient is φ = 57928285995840.

The previous prime is 78444553953023. The next prime is 78444553953097. The reversal of 78444553953025 is 52035935544487.

It can be written as a sum of positive squares in 6 ways, for example, as 11902831202304 + 66541722750721 = 3450048^2 + 8157311^2 .

It is not a de Polignac number, because 78444553953025 - 2¹ = 78444553953023 is a prime.

It is a hoax number, since the sum of its digits (64) coincides with the sum of the digits of its distinct prime factors.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (78444553953023) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 120683928834 + ... + 120683929483.

Almost surely, 2^{78444553953025} is an apocalyptic number.

It is an amenable number.

78444553953025 is a deficient number, since it is larger than the sum of its proper divisors (26309096556987).

78444553953025 is a wasteful number, since it uses less digits than its factorization.

78444553953025 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 241367858340 (or 241367858335 counting only the distinct ones).

The product of its (nonzero) digits is 362880000, while the sum is 64.

The spelling of 78444553953025 in words is "seventy-eight trillion, four hundred forty-four billion, five hundred fifty-three million, nine hundred fifty-three thousand, twenty-five".