13811831377 has 4 divisors (see below), whose sum is σ = 13812164080. Its totient is φ = 13811498676.

The previous prime is 13811831321. The next prime is 13811831389. The reversal of 13811831377 is 77313811831.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 13811831377 - 2¹¹ = 13811829329 is a prime.

It is a super-2 number, since 2×13811831377² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (13811831477) 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, 93423 + ... + 190660.

It is an arithmetic number, because the mean of its divisors is an integer number (3453041020).

Almost surely, 2^13811831377 is an apocalyptic number.

It is an amenable number.

13811831377 is a deficient number, since it is larger than the sum of its proper divisors (332703).

13811831377 is an equidigital number, since it uses as much as digits as its factorization.

13811831377 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 332702.

The product of its digits is 84672, while the sum is 43.

The spelling of 13811831377 in words is "thirteen billion, eight hundred eleven million, eight hundred thirty-one thousand, three hundred seventy-seven".