78544866144 has 48 divisors (see below), whose sum is σ = 206359695360. Its totient is φ = 26158838400.

The previous prime is 78544866139. The next prime is 78544866149. The reversal of 78544866144 is 44166844587.

It is an interprime number because it is at equal distance from previous prime (78544866139) and next prime (78544866149).

It is a tau number, because it is divible by the number of its divisors (48).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (78544866149) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 244924 + ... + 465915.

It is an arithmetic number, because the mean of its divisors is an integer number (4299160320).

Almost surely, 2^78544866144 is an apocalyptic number.

It is an amenable number.

78544866144 is an abundant number, since it is smaller than the sum of its proper divisors (127814829216).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

78544866144 is a wasteful number, since it uses less digits than its factorization.

78544866144 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 712003 (or 711995 counting only the distinct ones).

The product of its digits is 20643840, while the sum is 57.

The spelling of 78544866144 in words is "seventy-eight billion, five hundred forty-four million, eight hundred sixty-six thousand, one hundred forty-four".