40642841605 has 4 divisors (see below), whose sum is σ = 48771409932. Its totient is φ = 32514273280.

The previous prime is 40642841593. The next prime is 40642841611. The reversal of 40642841605 is 50614824604.

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 9688661761 + 30954179844 = 98431^2 + 175938^2 .

It is a de Polignac number, because none of the positive numbers 2^k-40642841605 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4064284156 + ... + 4064284165.

It is an arithmetic number, because the mean of its divisors is an integer number (12192852483).

Almost surely, 2^40642841605 is an apocalyptic number.

It is an amenable number.

40642841605 is a deficient number, since it is larger than the sum of its proper divisors (8128568327).

40642841605 is an equidigital number, since it uses as much as digits as its factorization.

40642841605 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8128568326.

The product of its (nonzero) digits is 184320, while the sum is 40.

The spelling of 40642841605 in words is "forty billion, six hundred forty-two million, eight hundred forty-one thousand, six hundred five".