13449863851 has 2 divisors, whose sum is σ = 13449863852. Its totient is φ = 13449863850.

The previous prime is 13449863813. The next prime is 13449863857. The reversal of 13449863851 is 15836894431.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 13449863851 - 2²¹ = 13447766699 is a prime.

It is a super-2 number, since 2×13449863851² (a number of 21 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (13449863857) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6724931925 + 6724931926.

It is an arithmetic number, because the mean of its divisors is an integer number (6724931926).

Almost surely, 2^13449863851 is an apocalyptic number.

13449863851 is a deficient number, since it is larger than the sum of its proper divisors (1).

13449863851 is an equidigital number, since it uses as much as digits as its factorization.

13449863851 is an evil number, because the sum of its binary digits is even.

The product of its digits is 2488320, while the sum is 52.

The spelling of 13449863851 in words is "thirteen billion, four hundred forty-nine million, eight hundred sixty-three thousand, eight hundred fifty-one".