40015746065 has 8 divisors (see below), whose sum is σ = 48676688808. Its totient is φ = 31574067840.

The previous prime is 40015746053. The next prime is 40015746097. The reversal of 40015746065 is 56064751004.

It can be written as a sum of positive squares in 4 ways, for example, as 4803598864 + 35212147201 = 69308^2 + 187649^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 40015746065 - 2¹⁴ = 40015729681 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 54815726 + ... + 54816455.

It is an arithmetic number, because the mean of its divisors is an integer number (6084586101).

Almost surely, 2^40015746065 is an apocalyptic number.

It is an amenable number.

40015746065 is a deficient number, since it is larger than the sum of its proper divisors (8660942743).

40015746065 is a wasteful number, since it uses less digits than its factorization.

40015746065 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 109632259.

The product of its (nonzero) digits is 100800, while the sum is 38.

The spelling of 40015746065 in words is "forty billion, fifteen million, seven hundred forty-six thousand, sixty-five".