78444044487 has 24 divisors (see below), whose sum is σ = 117873465840. Its totient is φ = 51559376400.

The previous prime is 78444044473. The next prime is 78444044489.

78444044487 is a `hidden beast` number, since 7 + 84 + 4 + 40 + 44 + 487 = 666.

78444044487 is nontrivially palindromic in base 10.

It is not a de Polignac number, because 78444044487 - 2¹⁸ = 78443782343 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (78444044489) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 152064 + ... + 424277.

It is an arithmetic number, because the mean of its divisors is an integer number (4911394410).

Almost surely, 2^78444044487 is an apocalyptic number.

78444044487 is a deficient number, since it is larger than the sum of its proper divisors (39429421353).

78444044487 is an equidigital number, since it uses as much as digits as its factorization.

78444044487 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 576492 (or 576415 counting only the distinct ones).

The product of its (nonzero) digits is 12845056, while the sum is 54.

The spelling of 78444044487 in words is "seventy-eight billion, four hundred forty-four million, forty-four thousand, four hundred eighty-seven".