40202043985 has 4 divisors (see below), whose sum is σ = 48242452788. Its totient is φ = 32161635184.

The previous prime is 40202043983. The next prime is 40202043997. The reversal of 40202043985 is 58934020204.

It is a happy number.

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 15065844049 + 25136199936 = 122743^2 + 158544^2 .

It is a cyclic number.

It is not a de Polignac number, because 40202043985 - 2¹ = 40202043983 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (40202043983) 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, 4020204394 + ... + 4020204403.

It is an arithmetic number, because the mean of its divisors is an integer number (12060613197).

Almost surely, 2^40202043985 is an apocalyptic number.

It is an amenable number.

40202043985 is a deficient number, since it is larger than the sum of its proper divisors (8040408803).

40202043985 is an equidigital number, since it uses as much as digits as its factorization.

40202043985 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8040408802.

The product of its (nonzero) digits is 69120, while the sum is 37.

The spelling of 40202043985 in words is "forty billion, two hundred two million, forty-three thousand, nine hundred eighty-five".