40648323409 has 4 divisors (see below), whose sum is σ = 41959559680. Its totient is φ = 39337087140.

The previous prime is 40648323403. The next prime is 40648323431. The reversal of 40648323409 is 90432384604.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 40648323409 - 2⁷ = 40648323281 is a prime.

It is a super-3 number, since 3×40648323409³ (a number of 33 digits) contains 333 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (40648323403) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 655618089 + ... + 655618150.

It is an arithmetic number, because the mean of its divisors is an integer number (10489889920).

Almost surely, 2^40648323409 is an apocalyptic number.

It is an amenable number.

40648323409 is a deficient number, since it is larger than the sum of its proper divisors (1311236271).

40648323409 is a wasteful number, since it uses less digits than its factorization.

40648323409 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1311236270.

The product of its (nonzero) digits is 497664, while the sum is 43.

The spelling of 40648323409 in words is "forty billion, six hundred forty-eight million, three hundred twenty-three thousand, four hundred nine".