78780710144 has 72 divisors (see below), whose sum is σ = 158318980680. Its totient is φ = 39124205568.

The previous prime is 78780710143. The next prime is 78780710201. The reversal of 78780710144 is 44101708787.

It can be written as a sum of positive squares in 4 ways, for example, as 22174783744 + 56605926400 = 148912^2 + 237920^2 .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (78780710143) 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, 61117052 + ... + 61118340.

Almost surely, 2^78780710144 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 78780710144, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (79159490340).

78780710144 is an abundant number, since it is smaller than the sum of its proper divisors (79538270536).

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

78780710144 is a wasteful number, since it uses less digits than its factorization.

78780710144 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2735 (or 2721 counting only the distinct ones).

The product of its (nonzero) digits is 351232, while the sum is 47.

The spelling of 78780710144 in words is "seventy-eight billion, seven hundred eighty million, seven hundred ten thousand, one hundred forty-four".