401465206165 has 4 divisors (see below), whose sum is σ = 481758247404. Its totient is φ = 321172164928.

The previous prime is 401465206147. The next prime is 401465206169. The reversal of 401465206165 is 561602564104.

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 194892229156 + 206572977009 = 441466^2 + 454503^2 .

It is a cyclic number.

It is not a de Polignac number, because 401465206165 - 2¹⁷ = 401465075093 is a prime.

It is a super-2 number, since 2×401465206165² (a number of 24 digits) contains 22 as substring.

It is a Smith number, since the sum of its digits (40) 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 (401465206169) 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, 40146520612 + ... + 40146520621.

It is an arithmetic number, because the mean of its divisors is an integer number (120439561851).

Almost surely, 2^401465206165 is an apocalyptic number.

It is an amenable number.

401465206165 is a deficient number, since it is larger than the sum of its proper divisors (80293041239).

401465206165 is an equidigital number, since it uses as much as digits as its factorization.

401465206165 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 80293041238.

The product of its (nonzero) digits is 172800, while the sum is 40.

The spelling of 401465206165 in words is "four hundred one billion, four hundred sixty-five million, two hundred six thousand, one hundred sixty-five".