13812998787 has 48 divisors (see below), whose sum is σ = 23940983040. Its totient is φ = 7507152576.

The previous prime is 13812998779. The next prime is 13812998821. The reversal of 13812998787 is 78789921831.

It is not a de Polignac number, because 13812998787 - 2³ = 13812998779 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (63).

It is not an unprimeable number, because it can be changed into a prime (13812997787) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 65988 + ... + 178830.

It is an arithmetic number, because the mean of its divisors is an integer number (498770480).

Almost surely, 2^13812998787 is an apocalyptic number.

13812998787 is a deficient number, since it is larger than the sum of its proper divisors (10127984253).

13812998787 is a wasteful number, since it uses less digits than its factorization.

13812998787 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 112952 (or 112949 counting only the distinct ones).

The product of its digits is 12192768, while the sum is 63.

The spelling of 13812998787 in words is "thirteen billion, eight hundred twelve million, nine hundred ninety-eight thousand, seven hundred eighty-seven".