405002042051 has 8 divisors (see below), whose sum is σ = 422879871744. Its totient is φ = 387146632840.

The previous prime is 405002042047. The next prime is 405002042089. The reversal of 405002042051 is 150240200504.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 405002042051 - 2² = 405002042047 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (23).

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (405002042041) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 5568191 + ... + 5640456.

It is an arithmetic number, because the mean of its divisors is an integer number (52859983968).

Almost surely, 2^405002042051 is an apocalyptic number.

405002042051 is a deficient number, since it is larger than the sum of its proper divisors (17877829693).

405002042051 is a wasteful number, since it uses less digits than its factorization.

405002042051 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11210241.

The product of its (nonzero) digits is 1600, while the sum is 23.

Adding to 405002042051 its reverse (150240200504), we get a palindrome (555242242555).

The spelling of 405002042051 in words is "four hundred five billion, two million, forty-two thousand, fifty-one".