40204411865 has 4 divisors (see below), whose sum is σ = 48245294244. Its totient is φ = 32163529488.

The previous prime is 40204411853. The next prime is 40204411921. The reversal of 40204411865 is 56811440204.

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 20789890969 + 19414520896 = 144187^2 + 139336^2 .

It is a cyclic number.

It is not a de Polignac number, because 40204411865 - 2³² = 35909444569 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, 4020441182 + ... + 4020441191.

It is an arithmetic number, because the mean of its divisors is an integer number (12061323561).

Almost surely, 2^40204411865 is an apocalyptic number.

It is an amenable number.

40204411865 is a deficient number, since it is larger than the sum of its proper divisors (8040882379).

40204411865 is an equidigital number, since it uses as much as digits as its factorization.

40204411865 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8040882378.

The product of its (nonzero) digits is 30720, while the sum is 35.

The spelling of 40204411865 in words is "forty billion, two hundred four million, four hundred eleven thousand, eight hundred sixty-five".