13787479312 has 20 divisors (see below), whose sum is σ = 27435221836. Its totient is φ = 6707422080.

The previous prime is 13787479271. The next prime is 13787479319. The reversal of 13787479312 is 21397478731.

It can be written as a sum of positive squares in 2 ways, for example, as 10000800016 + 3786679296 = 100004^2 + 61536^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 13787479312.

It is not an unprimeable number, because it can be changed into a prime (13787479319) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 11644239 + ... + 11645422.

Almost surely, 2^13787479312 is an apocalyptic number.

It is an amenable number.

13787479312 is a deficient number, since it is larger than the sum of its proper divisors (13647742524).

13787479312 is a wasteful number, since it uses less digits than its factorization.

13787479312 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 23289706 (or 23289700 counting only the distinct ones).

The product of its digits is 1778112, while the sum is 52.

The spelling of 13787479312 in words is "thirteen billion, seven hundred eighty-seven million, four hundred seventy-nine thousand, three hundred twelve".