400525064601065 has 4 divisors (see below), whose sum is σ = 480630077521284. Its totient is φ = 320420051680848.

The previous prime is 400525064600987. The next prime is 400525064601091. The reversal of 400525064601065 is 560106460525004.

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 89076372528784 + 311448692072281 = 9438028^2 + 17647909^2 .

It is a cyclic number.

It is not a de Polignac number, because 400525064601065 - 2¹⁰ = 400525064600041 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 40052506460102 + ... + 40052506460111.

It is an arithmetic number, because the mean of its divisors is an integer number (120157519380321).

Almost surely, 2^{400525064601065} is an apocalyptic number.

It is an amenable number.

400525064601065 is a deficient number, since it is larger than the sum of its proper divisors (80105012920219).

400525064601065 is an equidigital number, since it uses as much as digits as its factorization.

400525064601065 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 80105012920218.

The product of its (nonzero) digits is 864000, while the sum is 44.

The spelling of 400525064601065 in words is "four hundred trillion, five hundred twenty-five billion, sixty-four million, six hundred one thousand, sixty-five".