40040238865 has 24 divisors (see below), whose sum is σ = 53809928424. Its totient is φ = 28570713600.

The previous prime is 40040238851. The next prime is 40040238877. The reversal of 40040238865 is 56883204004.

It can be written as a sum of positive squares in 4 ways, for example, as 17458865424 + 22581373441 = 132132^2 + 150271^2 .

It is not a de Polignac number, because 40040238865 - 2¹³ = 40040230673 is a prime.

It is a hoax number, since the sum of its digits (40) coincides with the sum of the digits of its distinct prime factors.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 592296 + ... + 656425.

It is an arithmetic number, because the mean of its divisors is an integer number (2242080351).

Almost surely, 2^40040238865 is an apocalyptic number.

It is an amenable number.

40040238865 is a deficient number, since it is larger than the sum of its proper divisors (13769689559).

40040238865 is a wasteful number, since it uses less digits than its factorization.

40040238865 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1248801 (or 1248790 counting only the distinct ones).

The product of its (nonzero) digits is 184320, while the sum is 40.

The spelling of 40040238865 in words is "forty billion, forty million, two hundred thirty-eight thousand, eight hundred sixty-five".