405205404252551 has 8 divisors (see below), whose sum is σ = 463092046523040. Its totient is φ = 347318800969248.

The previous prime is 405205404252461. The next prime is 405205404252613. The reversal of 405205404252551 is 155252404502504.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-405205404252551 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (405205404282551) by changing a digit.

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 7 ways as a sum of consecutive naturals, for example, 17663525 + ... + 33502401.

It is an arithmetic number, because the mean of its divisors is an integer number (57886505815380).

Almost surely, 2^{405205404252551} is an apocalyptic number.

405205404252551 is a deficient number, since it is larger than the sum of its proper divisors (57886642270489).

405205404252551 is a wasteful number, since it uses less digits than its factorization.

405205404252551 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 19493593.

The product of its (nonzero) digits is 1600000, while the sum is 44.

The spelling of 405205404252551 in words is "four hundred five trillion, two hundred five billion, four hundred four million, two hundred fifty-two thousand, five hundred fifty-one".