40202709137 has 4 divisors (see below), whose sum is σ = 40654425060. Its totient is φ = 39750993216.

The previous prime is 40202709133. The next prime is 40202709149. The reversal of 40202709137 is 73190720204.

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 27096122881 + 13106586256 = 164609^2 + 114484^2 .

It is a cyclic number.

It is not a de Polignac number, because 40202709137 - 2² = 40202709133 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 40202709097 and 40202709106.

It is not an unprimeable number, because it can be changed into a prime (40202709133) 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, 225857828 + ... + 225858005.

It is an arithmetic number, because the mean of its divisors is an integer number (10163606265).

Almost surely, 2^40202709137 is an apocalyptic number.

It is an amenable number.

40202709137 is a deficient number, since it is larger than the sum of its proper divisors (451715923).

40202709137 is an equidigital number, since it uses as much as digits as its factorization.

40202709137 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 451715922.

The product of its (nonzero) digits is 21168, while the sum is 35.

The spelling of 40202709137 in words is "forty billion, two hundred two million, seven hundred nine thousand, one hundred thirty-seven".