40652009509 has 4 divisors (see below), whose sum is σ = 43043304204. Its totient is φ = 38260714816.

The previous prime is 40652009477. The next prime is 40652009579. The reversal of 40652009509 is 90590025604.

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 29832889284 + 10819120225 = 172722^2 + 104015^2 .

It is a cyclic number.

It is not a de Polignac number, because 40652009509 - 2⁵ = 40652009477 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (40652009579) 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, 1195647322 + ... + 1195647355.

It is an arithmetic number, because the mean of its divisors is an integer number (10760826051).

Almost surely, 2^40652009509 is an apocalyptic number.

It is an amenable number.

40652009509 is a deficient number, since it is larger than the sum of its proper divisors (2391294695).

40652009509 is a wasteful number, since it uses less digits than its factorization.

40652009509 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2391294694.

The product of its (nonzero) digits is 97200, while the sum is 40.

The spelling of 40652009509 in words is "forty billion, six hundred fifty-two million, nine thousand, five hundred nine".