405011247481 has 4 divisors (see below), whose sum is σ = 418076126464. Its totient is φ = 391946368500.

The previous prime is 405011247449. The next prime is 405011247497. The reversal of 405011247481 is 184742110504.

It is a happy number.

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 405011247481 - 2⁵ = 405011247449 is a prime.

It is a super-2 number, since 2×405011247481² (a number of 24 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 405011247481.

It is not an unprimeable number, because it can be changed into a prime (405011247281) 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, 6532439445 + ... + 6532439506.

It is an arithmetic number, because the mean of its divisors is an integer number (104519031616).

Almost surely, 2^405011247481 is an apocalyptic number.

It is an amenable number.

405011247481 is a deficient number, since it is larger than the sum of its proper divisors (13064878983).

405011247481 is a wasteful number, since it uses less digits than its factorization.

405011247481 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13064878982.

The product of its (nonzero) digits is 35840, while the sum is 37.

Adding to 405011247481 its reverse (184742110504), we get a palindrome (589753357985).

The spelling of 405011247481 in words is "four hundred five billion, eleven million, two hundred forty-seven thousand, four hundred eighty-one".