78481450838144 has 32 divisors (see below), whose sum is σ = 156368116272540. Its totient is φ = 39236119695360.

The previous prime is 78481450838143. The next prime is 78481450838183. The reversal of 78481450838144 is 44183805418487.

It can be written as a sum of positive squares in 2 ways, for example, as 72769771470400 + 5711679367744 = 8530520^2 + 2389912^2 .

It is a tau number, because it is divible by the number of its divisors (32).

It is not an unprimeable number, because it can be changed into a prime (78481450838143) 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, 34887269 + ... + 37068644.

Almost surely, 2^{78481450838144} is an apocalyptic number.

It is an amenable number.

78481450838144 is a deficient number, since it is larger than the sum of its proper divisors (77886665434396).

78481450838144 is an equidigital number, since it uses as much as digits as its factorization.

78481450838144 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 71964448 (or 71964436 counting only the distinct ones).

The product of its (nonzero) digits is 110100480, while the sum is 65.

The spelling of 78481450838144 in words is "seventy-eight trillion, four hundred eighty-one billion, four hundred fifty million, eight hundred thirty-eight thousand, one hundred forty-four".