405531540122052 has 12 divisors (see below), whose sum is σ = 946240260284816. Its totient is φ = 135177180040680.

The previous prime is 405531540122041. The next prime is 405531540122063. The reversal of 405531540122052 is 250221045135504.

It is an interprime number because it is at equal distance from previous prime (405531540122041) and next prime (405531540122063).

It is a tau number, because it is divible by the number of its divisors (12).

It is a self number, because there is not a number n which added to its sum of digits gives 405531540122052.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 16897147505074 + ... + 16897147505097.

Almost surely, 2^{405531540122052} is an apocalyptic number.

It is an amenable number.

405531540122052 is an abundant number, since it is smaller than the sum of its proper divisors (540708720162764).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

405531540122052 is a wasteful number, since it uses less digits than its factorization.

405531540122052 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 33794295010178 (or 33794295010176 counting only the distinct ones).

The product of its (nonzero) digits is 240000, while the sum is 39.

Adding to 405531540122052 its reverse (250221045135504), we get a palindrome (655752585257556).

The spelling of 405531540122052 in words is "four hundred five trillion, five hundred thirty-one billion, five hundred forty million, one hundred twenty-two thousand, fifty-two".