12787945904 has 160 divisors (see below), whose sum is σ = 28479320064. Its totient is φ = 5527019520.

The previous prime is 12787945903. The next prime is 12787945949. The reversal of 12787945904 is 40954978721.

It is a happy number.

It is a self number, because there is not a number n which added to its sum of digits gives 12787945904.

It is not an unprimeable number, because it can be changed into a prime (12787945901) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 45186947 + ... + 45187229.

Almost surely, 2^12787945904 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 12787945904, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (14239660032).

12787945904 is an abundant number, since it is smaller than the sum of its proper divisors (15691374160).

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

12787945904 is a wasteful number, since it uses less digits than its factorization.

12787945904 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 595 (or 589 counting only the distinct ones).

The product of its (nonzero) digits is 5080320, while the sum is 56.

The spelling of 12787945904 in words is "twelve billion, seven hundred eighty-seven million, nine hundred forty-five thousand, nine hundred four".