13378645072 has 40 divisors (see below), whose sum is σ = 28202884136. Its totient is φ = 6111092736.

The previous prime is 13378645069. The next prime is 13378645079. The reversal of 13378645072 is 27054687331.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 283046976 + 13095598096 = 16824^2 + 114436^2 .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (13378645079) 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, 311373 + ... + 351724.

Almost surely, 2^13378645072 is an apocalyptic number.

It is an amenable number.

13378645072 is an abundant number, since it is smaller than the sum of its proper divisors (14824239064).

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

13378645072 is a wasteful number, since it uses less digits than its factorization.

13378645072 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 663215 (or 663209 counting only the distinct ones).

The product of its (nonzero) digits is 846720, while the sum is 46.

The spelling of 13378645072 in words is "thirteen billion, three hundred seventy-eight million, six hundred forty-five thousand, seventy-two".