40405140202 has 24 divisors (see below), whose sum is σ = 70533775620. Its totient is φ = 17308892160.

The previous prime is 40405140179. The next prime is 40405140203. The reversal of 40405140202 is 20204150404.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 40341124201 + 64016001 = 200851^2 + 8001^2 .

It is not an unprimeable number, because it can be changed into a prime (40405140203) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 137002 + ... + 315562.

Almost surely, 2^40405140202 is an apocalyptic number.

40405140202 is a deficient number, since it is larger than the sum of its proper divisors (30128635418).

40405140202 is a wasteful number, since it uses less digits than its factorization.

40405140202 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 180886 (or 180879 counting only the distinct ones).

The product of its (nonzero) digits is 1280, while the sum is 22.

Adding to 40405140202 its reverse (20204150404), we get a palindrome (60609290606).

The spelling of 40405140202 in words is "forty billion, four hundred five million, one hundred forty thousand, two hundred two".