405145220254 has 8 divisors (see below), whose sum is σ = 614546120880. Its totient is φ = 200296513296.

The previous prime is 405145220239. The next prime is 405145220257. The reversal of 405145220254 is 452022541504.

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (405145220257) 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, 1138048194 + ... + 1138048549.

It is an arithmetic number, because the mean of its divisors is an integer number (76818265110).

Almost surely, 2^405145220254 is an apocalyptic number.

405145220254 is a deficient number, since it is larger than the sum of its proper divisors (209400900626).

405145220254 is a wasteful number, since it uses less digits than its factorization.

405145220254 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2276096834.

The product of its (nonzero) digits is 64000, while the sum is 34.

Adding to 405145220254 its reverse (452022541504), we get a palindrome (857167761758).

The spelling of 405145220254 in words is "four hundred five billion, one hundred forty-five million, two hundred twenty thousand, two hundred fifty-four".