405606801601 has 4 divisors (see below), whose sum is σ = 405636052612. Its totient is φ = 405577550592.

The previous prime is 405606801599. The next prime is 405606801653. The reversal of 405606801601 is 106108606504.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 196670962576 + 208935839025 = 443476^2 + 457095^2 .

It is a cyclic number.

It is not a de Polignac number, because 405606801601 - 2¹ = 405606801599 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (405606601601) 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, 14604696 + ... + 14632441.

It is an arithmetic number, because the mean of its divisors is an integer number (101409013153).

Almost surely, 2^405606801601 is an apocalyptic number.

It is an amenable number.

405606801601 is a deficient number, since it is larger than the sum of its proper divisors (29251011).

405606801601 is a wasteful number, since it uses less digits than its factorization.

405606801601 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 29251010.

The product of its (nonzero) digits is 34560, while the sum is 37.

The spelling of 405606801601 in words is "four hundred five billion, six hundred six million, eight hundred one thousand, six hundred one".