40065564025 has 12 divisors (see below), whose sum is σ = 50495748844. Its totient is φ = 31527000000.

The previous prime is 40065564013. The next prime is 40065564089. The reversal of 40065564025 is 52046556004.

It can be written as a sum of positive squares in 6 ways, for example, as 9028990441 + 31036573584 = 95021^2 + 176172^2 .

It is not a de Polignac number, because 40065564025 - 2¹⁹ = 40065039737 is a prime.

It is a hoax number, since the sum of its digits (37) 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 11 ways as a sum of consecutive naturals, for example, 13134726 + ... + 13137775.

Almost surely, 2^40065564025 is an apocalyptic number.

It is an amenable number.

40065564025 is a deficient number, since it is larger than the sum of its proper divisors (10430184819).

40065564025 is a wasteful number, since it uses less digits than its factorization.

40065564025 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 26272572 (or 26272567 counting only the distinct ones).

The product of its (nonzero) digits is 144000, while the sum is 37.

The spelling of 40065564025 in words is "forty billion, sixty-five million, five hundred sixty-four thousand, twenty-five".