4123405555849 has 4 divisors (see below), whose sum is σ = 4141102575636. Its totient is φ = 4105708536064.

The previous prime is 4123405555811. The next prime is 4123405555889. The reversal of 4123405555849 is 9485555043214.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 2561817922624 + 1561587633225 = 1600568^2 + 1249635^2 .

It is a cyclic number.

It is not a de Polignac number, because 4123405555849 - 2⁷ = 4123405555721 is a prime.

It is a super-2 number, since 2×4123405555849² (a number of 26 digits) contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 4123405555849.

It is not an unprimeable number, because it can be changed into a prime (4123405555889) 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, 8848509544 + ... + 8848510009.

It is an arithmetic number, because the mean of its divisors is an integer number (1035275643909).

Almost surely, 2^{4123405555849} is an apocalyptic number.

It is an amenable number.

4123405555849 is a deficient number, since it is larger than the sum of its proper divisors (17697019787).

4123405555849 is a wasteful number, since it uses less digits than its factorization.

4123405555849 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 17697019786.

The product of its (nonzero) digits is 17280000, while the sum is 55.

The spelling of 4123405555849 in words is "four trillion, one hundred twenty-three billion, four hundred five million, five hundred fifty-five thousand, eight hundred forty-nine".