40881257565 has 16 divisors (see below), whose sum is σ = 68852644800. Its totient is φ = 20655793152.

The previous prime is 40881257513. The next prime is 40881257591. The reversal of 40881257565 is 56575218804.

It is not a de Polignac number, because 40881257565 - 2⁷ = 40881257437 is a prime.

It is a super-3 number, since 3×40881257565³ (a number of 33 digits) contains 333 as substring.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 71721220 + ... + 71721789.

It is an arithmetic number, because the mean of its divisors is an integer number (4303290300).

Almost surely, 2^40881257565 is an apocalyptic number.

It is an amenable number.

40881257565 is a deficient number, since it is larger than the sum of its proper divisors (27971387235).

40881257565 is a wasteful number, since it uses less digits than its factorization.

40881257565 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 143443036.

The product of its (nonzero) digits is 2688000, while the sum is 51.

The spelling of 40881257565 in words is "forty billion, eight hundred eighty-one million, two hundred fifty-seven thousand, five hundred sixty-five".