40209616065 has 16 divisors (see below), whose sum is σ = 66553848000. Its totient is φ = 20705641152.

The previous prime is 40209616037. The next prime is 40209616079. The reversal of 40209616065 is 56061690204.

It is not a de Polignac number, because 40209616065 - 2⁵ = 40209616033 is a prime.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 46217515 + ... + 46218384.

It is an arithmetic number, because the mean of its divisors is an integer number (4159615500).

Almost surely, 2^40209616065 is an apocalyptic number.

It is an amenable number.

40209616065 is a deficient number, since it is larger than the sum of its proper divisors (26344231935).

40209616065 is a wasteful number, since it uses less digits than its factorization.

40209616065 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 92435936.

The product of its (nonzero) digits is 77760, while the sum is 39.

The spelling of 40209616065 in words is "forty billion, two hundred nine million, six hundred sixteen thousand, sixty-five".