405775855901 has 16 divisors (see below), whose sum is σ = 438999859200. Its totient is φ = 372839830848.

The previous prime is 405775855889. The next prime is 405775855921. The reversal of 405775855901 is 109558577504.

It is a cyclic number.

It is not a de Polignac number, because 405775855901 - 2¹⁴ = 405775839517 is a prime.

It is a Smith number, since the sum of its digits (56) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (405775855921) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 15225950 + ... + 15252576.

It is an arithmetic number, because the mean of its divisors is an integer number (27437491200).

Almost surely, 2^405775855901 is an apocalyptic number.

It is an amenable number.

405775855901 is a deficient number, since it is larger than the sum of its proper divisors (33224003299).

405775855901 is a wasteful number, since it uses less digits than its factorization.

405775855901 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 31988.

The product of its (nonzero) digits is 8820000, while the sum is 56.

The spelling of 405775855901 in words is "four hundred five billion, seven hundred seventy-five million, eight hundred fifty-five thousand, nine hundred one".