78090051344 has 20 divisors (see below), whose sum is σ = 160199444124. Its totient is φ = 36748259328.

The previous prime is 78090051337. The next prime is 78090051349. The reversal of 78090051344 is 44315009087.

It can be written as a sum of positive squares in 2 ways, for example, as 57408160000 + 20681891344 = 239600^2 + 143812^2 .

It is a super-2 number, since 2×78090051344² (a number of 23 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (78090051349) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 143547617 + ... + 143548160.

Almost surely, 2^78090051344 is an apocalyptic number.

It is an amenable number.

78090051344 is an abundant number, since it is smaller than the sum of its proper divisors (82109392780).

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

78090051344 is a wasteful number, since it uses less digits than its factorization.

78090051344 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 287095802 (or 287095796 counting only the distinct ones).

The product of its (nonzero) digits is 120960, while the sum is 41.

The spelling of 78090051344 in words is "seventy-eight billion, ninety million, fifty-one thousand, three hundred forty-four".